diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index 1b52aa206..4ea957a48 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -3,7 +3,7 @@
  * Lo-Dash 3.0.0-pre (Custom Build) <http://lodash.com/>
  * Build: `lodash -o ./dist/lodash.compat.js`
  * Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.6.0 <http://underscorejs.org/LICENSE>
+ * Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
  * Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <http://lodash.com/license>
  */
@@ -28,9 +28,6 @@
   var HOT_COUNT = 150,
       HOT_SPAN = 16;
 
-  /** Used as the property name for wrapper metadata */
-  var EXPANDO = '__lodash_' + VERSION.replace(/[-.]/g, '_') + '__';
-
   /** Used as the TypeError message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
@@ -202,14 +199,6 @@
     'trailing': false
   };
 
-  /** Used as the property descriptor for wrapper metadata */
-  var descriptor = {
-    'configurable': false,
-    'enumerable': false,
-    'value': null,
-    'writable': false
-  };
-
   /**
    * Used to convert characters to HTML entities.
    *
@@ -722,17 +711,6 @@
       return result;
     }());
 
-    /** Used to set metadata on functions */
-    var defineProperty = (function() {
-      // IE 8 only accepts DOM elements
-      try {
-        var o = {},
-            func = isNative(func = Object.defineProperty) && func,
-            result = func(o, o, o) && func;
-      } catch(e) {}
-      return result;
-    }());
-
     /* Native method references for those with the same name as other `lodash` methods */
     var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
         nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
@@ -779,7 +757,7 @@
       }
     });
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a `lodash` object which wraps the given value to enable intuitive
@@ -1098,7 +1076,7 @@
       }
     };
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * A specialized version of `_.forEach` for arrays without support for
@@ -2151,7 +2129,7 @@
         var data = getData(func),
             arity = data ? data[2] : func.length;
 
-        arity -= args.length;
+        arity = nativeMax(arity - args.length, 0);
       }
       return (bitmask & PARTIAL_FLAG)
         ? createWrapper(func, bitmask, arity, thisArg, args, holders)
@@ -2226,19 +2204,10 @@
      * @param {*} data The metadata.
      * @returns {Function} Returns `func`.
      */
-    function baseSetData(func, data) {
+    var baseSetData = !metaMap ? identity : function(func, data) {
       metaMap.set(func, data);
       return func;
-    }
-    // fallback for environments without `WeakMap`
-    if (!WeakMap) {
-      baseSetData = !defineProperty ? identity : function(func, value) {
-        descriptor.value = value;
-        defineProperty(func, EXPANDO, descriptor);
-        descriptor.value = null;
-        return func;
-      };
-    }
+    };
 
     /**
      * The base implementation of `_.some` without support for callback shorthands
@@ -2831,15 +2800,9 @@
      * @param {Function} func The function to query.
      * @returns {*} Returns the metadata for `func`.
      */
-    function getData(func) {
+    var getData = !metaMap ? noop : function(func) {
       return metaMap.get(func);
-    }
-    // fallback for environments without `WeakMap`
-    if (!WeakMap) {
-      getData = !defineProperty ? noop : function(func) {
-        return func[EXPANDO];
-      };
-    }
+    };
 
     /**
      * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
@@ -3196,7 +3159,7 @@
       return isObject(value) ? value : Object(value);
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates an array of elements split into groups the length of `size`.
@@ -4467,7 +4430,7 @@
       return result;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a `lodash` object that wraps `value` with explicit method
@@ -4588,7 +4551,7 @@
       return this.__wrapped__;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates an array of elements corresponding to the specified keys, or indexes,
@@ -5733,7 +5696,7 @@
       return filter(collection, matches(source));
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * The opposite of `_.before`; this method creates a function that invokes
@@ -5760,7 +5723,13 @@
      */
     function after(n, func) {
       if (!isFunction(func)) {
-        throw new TypeError(FUNC_ERROR_TEXT);
+        if (isFunction(n)) {
+          var temp = n;
+          n = func;
+          func = temp;
+        } else {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
       }
       n = nativeIsFinite(n = +n) ? n : 0;
       return function() {
@@ -5788,7 +5757,13 @@
     function before(n, func) {
       var result;
       if (!isFunction(func)) {
-        throw new TypeError(FUNC_ERROR_TEXT);
+        if (isFunction(n)) {
+          var temp = n;
+          n = func;
+          func = temp;
+        } else {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
       }
       return function() {
         if (--n > 0) {
@@ -6546,37 +6521,7 @@
       return basePartial(wrapper, PARTIAL_FLAG, [value], []);
     }
 
-    /*--------------------------------------------------------------------------*/
-
-    /**
-     * Assigns own enumerable properties of source object(s) to the destination
-     * object. Subsequent sources overwrite property assignments of previous sources.
-     * If `customizer` is provided it is invoked to produce the assigned values.
-     * The `customizer` is bound to `thisArg` and invoked with five arguments;
-     * (objectValue, sourceValue, key, object, source).
-     *
-     * @static
-     * @memberOf _
-     * @alias extend
-     * @category Object
-     * @param {Object} object The destination object.
-     * @param {...Object} [sources] The source objects.
-     * @param {Function} [customizer] The function to customize assigning values.
-     * @param {*} [thisArg] The `this` binding of `customizer`.
-     * @returns {Object} Returns the destination object.
-     * @example
-     *
-     * _.assign({ 'name': 'fred' }, { 'age': 40 }, { 'employer': 'slate' });
-     * // => { 'name': 'fred', 'age': 40, 'employer': 'slate' }
-     *
-     * var defaults = _.partialRight(_.assign, function(value, other) {
-     *   return typeof value == 'undefined' ? other : value;
-     * });
-     *
-     * defaults({ 'name': 'barney' }, { 'age': 36 }, { 'name': 'fred', 'employer': 'slate' });
-     * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
-     */
-    var assign = createAssigner(baseAssign);
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
@@ -6593,7 +6538,7 @@
      *
      * @static
      * @memberOf _
-     * @category Object
+     * @category Lang
      * @param {*} value The value to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
@@ -6656,7 +6601,7 @@
      *
      * @static
      * @memberOf _
-     * @category Object
+     * @category Lang
      * @param {*} value The value to deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
      * @param {*} [thisArg] The `this` binding of `customizer`.
@@ -6689,6 +6634,563 @@
       return baseClone(value, true, customizer);
     }
 
+    /**
+     * Checks if `value` is classified as an `arguments` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+     * @example
+     *
+     * (function() { return _.isArguments(arguments); })();
+     * // => true
+     *
+     * _.isArguments([1, 2, 3]);
+     * // => false
+     */
+    function isArguments(value) {
+      var length = (value && typeof value == 'object') ? value.length : undefined;
+      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
+        toString.call(value) == argsClass) || false;
+    }
+    // fallback for environments without a `[[Class]]` for `arguments` objects
+    if (!support.argsClass) {
+      isArguments = function(value) {
+        var length = (value && typeof value == 'object') ? value.length : undefined;
+        return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
+          hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee')) || false;
+      };
+    }
+
+    /**
+     * Checks if `value` is classified as an `Array` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isArray([1, 2, 3]);
+     * // => true
+     *
+     * (function() { return _.isArray(arguments); })();
+     * // => false
+     */
+    var isArray = nativeIsArray || function(value) {
+      return (value && typeof value == 'object' && typeof value.length == 'number' &&
+        toString.call(value) == arrayClass) || false;
+    };
+
+    /**
+     * Checks if `value` is classified as a boolean primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isBoolean(false);
+     * // => true
+     *
+     * _.isBoolean(null);
+     * // => false
+     */
+    function isBoolean(value) {
+      return (value === true || value === false ||
+        value && typeof value == 'object' && toString.call(value) == boolClass) || false;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Date` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isDate(new Date);
+     * // => true
+     *
+     * _.isDate('Mon April 23 2012');
+     * // => false
+     */
+    function isDate(value) {
+      return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
+    }
+
+    /**
+     * Checks if `value` is a DOM element.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+     * @example
+     *
+     * _.isElement(document.body);
+     * // => true
+     *
+     * _.isElement('<body>');
+     * // => false
+     */
+    function isElement(value) {
+      return (value && typeof value == 'object' && value.nodeType === 1 &&
+        (support.nodeClass ? toString.call(value).indexOf('Element') > -1 : isHostObject(value))) || false;
+    }
+    // fallback for environments without DOM support
+    if (!support.dom) {
+      isElement = function(value) {
+        return (value && typeof value == 'object' && value.nodeType === 1 &&
+          !isPlainObject(value)) || false;
+      };
+    }
+
+    /**
+     * Checks if a collection is empty. A value is considered empty unless it is
+     * an array-like value with a length greater than `0` or an object with own
+     * enumerable properties.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {Array|Object|string} value The value to inspect.
+     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+     * @example
+     *
+     * _.isEmpty(null);
+     * // => true
+     *
+     * _.isEmpty(true);
+     * // => true
+     *
+     * _.isEmpty(1);
+     * // => true
+     *
+     * _.isEmpty([1, 2, 3]);
+     * // => false
+     *
+     * _.isEmpty({ 'a': 1 });
+     * // => false
+     */
+    function isEmpty(value) {
+      if (value == null) {
+        return true;
+      }
+      var length = value.length;
+      if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
+          (isArray(value) || isString(value) || isArguments(value) ||
+            (typeof value == 'object' && isFunction(value.splice)))) {
+        return !length;
+      }
+      return !keys(value).length;
+    }
+
+    /**
+     * Performs a deep comparison between two values to determine if they are
+     * equivalent. If `customizer` is provided it is invoked to compare values.
+     * If `customizer` returns `undefined` comparisons are handled by the method
+     * instead. The `customizer` is bound to `thisArg` and invoked with three
+     * arguments; (value, other, key).
+     *
+     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
+     * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
+     * are **not** supported. Provide a customizer function to extend support
+     * for comparing other values.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to compare to `other`.
+     * @param {*} other The value to compare to `value`.
+     * @param {Function} [customizer] The function to customize comparing values.
+     * @param {*} [thisArg] The `this` binding of `customizer`.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * var other = { 'name': 'fred' };
+     *
+     * object == other;
+     * // => false
+     *
+     * _.isEqual(object, other);
+     * // => true
+     *
+     * var words = ['hello', 'goodbye'];
+     * var otherWords = ['hi', 'goodbye'];
+     *
+     * _.isEqual(words, otherWords, function() {
+     *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
+     * });
+     * // => true
+     */
+    function isEqual(value, other, customizer, thisArg) {
+      customizer = typeof customizer == 'function' && baseCallback(customizer, thisArg, 3);
+      return (!customizer && isStrictComparable(value) && isStrictComparable(other))
+        ? value === other
+        : baseIsEqual(value, other, customizer);
+    }
+
+    /**
+     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+     * `SyntaxError`, `TypeError`, or `URIError` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+     * @example
+     *
+     * _.isError(new Error);
+     * // => true
+     *
+     * _.isError(Error);
+     * // => false
+     */
+    function isError(value) {
+      return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
+    }
+
+    /**
+     * Checks if `value` is a finite primitive number.
+     *
+     * **Note:** This method is based on ES6 `Number.isFinite`. See the
+     * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
+     * for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+     * @example
+     *
+     * _.isFinite(10);
+     * // => true
+     *
+     * _.isFinite('10');
+     * // => false
+     *
+     * _.isFinite(true);
+     * // => false
+     *
+     * _.isFinite(Object(10));
+     * // => false
+     *
+     * _.isFinite(Infinity);
+     * // => false
+     */
+    var isFinite = nativeNumIsFinite || function(value) {
+      return typeof value == 'number' && nativeIsFinite(value);
+    };
+
+    /**
+     * Checks if `value` is classified as a `Function` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isFunction(_);
+     * // => true
+     *
+     * _.isFunction(/abc/);
+     * // => false
+     */
+    function isFunction(value) {
+      // avoid a Chakra bug in IE 11
+      // https://github.com/jashkenas/underscore/issues/1621
+      return typeof value == 'function' || false;
+    }
+    // fallback for older versions of Chrome and Safari
+    if (isFunction(/x/)) {
+      isFunction = function(value) {
+        return typeof value == 'function' && toString.call(value) == funcClass;
+      };
+    }
+
+    /**
+     * Checks if `value` is the language type of `Object`.
+     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+     *
+     * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+     * @example
+     *
+     * _.isObject({});
+     * // => true
+     *
+     * _.isObject([1, 2, 3]);
+     * // => true
+     *
+     * _.isObject(1);
+     * // => false
+     */
+    function isObject(value) {
+      // avoid a V8 bug in Chrome 19-20
+      // https://code.google.com/p/v8/issues/detail?id=2291
+      var type = typeof value;
+      return type == 'function' || (value && type == 'object') || false;
+    }
+
+    /**
+     * Checks if `value` is `NaN`.
+     *
+     * **Note:** This method is not the same as native `isNaN` which returns `true`
+     * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
+     * for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+     * @example
+     *
+     * _.isNaN(NaN);
+     * // => true
+     *
+     * _.isNaN(new Number(NaN));
+     * // => true
+     *
+     * isNaN(undefined);
+     * // => true
+     *
+     * _.isNaN(undefined);
+     * // => false
+     */
+    function isNaN(value) {
+      // `NaN` as a primitive is the only value that is not equal to itself
+      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
+      return isNumber(value) && value != +value;
+    }
+
+    /**
+     * Checks if `value` is a native function.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
+     * @example
+     *
+     * _.isNative(Array.prototype.push);
+     * // => true
+     *
+     * _.isNative(_);
+     * // => false
+     */
+    function isNative(value) {
+      if (isFunction(value)) {
+        return reNative.test(fnToString.call(value));
+      }
+      return (value && typeof value == 'object' &&
+        (isHostObject(value) ? reNative : reHostCtor).test(value)) || false;
+    }
+
+    /**
+     * Checks if `value` is `null`.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+     * @example
+     *
+     * _.isNull(null);
+     * // => true
+     *
+     * _.isNull(void 0);
+     * // => false
+     */
+    function isNull(value) {
+      return value === null;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Number` primitive or object.
+     *
+     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
+     * as numbers, use the `_.isFinite` method.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isNumber(8.4);
+     * // => true
+     *
+     * _.isNumber(NaN);
+     * // => true
+     *
+     * _.isNumber('8.4');
+     * // => false
+     */
+    function isNumber(value) {
+      var type = typeof value;
+      return type == 'number' ||
+        (value && type == 'object' && toString.call(value) == numberClass) || false;
+    }
+
+    /**
+     * Checks if `value` is an object created by the `Object` constructor or has
+     * a `[[Prototype]]` of `null`.
+     *
+     * **Note:** This method assumes objects created by the `Object` constructor
+     * have no inherited enumerable properties.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * _.isPlainObject(new Shape);
+     * // => false
+     *
+     * _.isPlainObject([1, 2, 3]);
+     * // => false
+     *
+     * _.isPlainObject({ 'x': 0, 'y': 0 });
+     * // => true
+     *
+     * _.isPlainObject(Object.create(null));
+     * // => true
+     */
+    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
+      if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) {
+        return false;
+      }
+      var valueOf = value.valueOf,
+          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
+
+      return objProto
+        ? (value == objProto || getPrototypeOf(value) == objProto)
+        : shimIsPlainObject(value);
+    };
+
+    /**
+     * Checks if `value` is classified as a `RegExp` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isRegExp(/abc/);
+     * // => true
+     *
+     * _.isRegExp('/abc/');
+     * // => false
+     */
+    function isRegExp(value) {
+      return (isObject(value) && toString.call(value) == regexpClass) || false;
+    }
+
+    /**
+     * Checks if `value` is classified as a `String` primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isString('abc');
+     * // => true
+     *
+     * _.isString(1);
+     * // => false
+     */
+    function isString(value) {
+      return typeof value == 'string' ||
+        (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
+    }
+
+    /**
+     * Checks if `value` is `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+     * @example
+     *
+     * _.isUndefined(void 0);
+     * // => true
+     *
+     * _.isUndefined(null);
+     * // => false
+     */
+    function isUndefined(value) {
+      return typeof value == 'undefined';
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Assigns own enumerable properties of source object(s) to the destination
+     * object. Subsequent sources overwrite property assignments of previous sources.
+     * If `customizer` is provided it is invoked to produce the assigned values.
+     * The `customizer` is bound to `thisArg` and invoked with five arguments;
+     * (objectValue, sourceValue, key, object, source).
+     *
+     * @static
+     * @memberOf _
+     * @alias extend
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @param {Function} [customizer] The function to customize assigning values.
+     * @param {*} [thisArg] The `this` binding of `customizer`.
+     * @returns {Object} Returns the destination object.
+     * @example
+     *
+     * _.assign({ 'name': 'fred' }, { 'age': 40 }, { 'employer': 'slate' });
+     * // => { 'name': 'fred', 'age': 40, 'employer': 'slate' }
+     *
+     * var defaults = _.partialRight(_.assign, function(value, other) {
+     *   return typeof value == 'undefined' ? other : value;
+     * });
+     *
+     * defaults({ 'name': 'barney' }, { 'age': 36 }, { 'name': 'fred', 'employer': 'slate' });
+     * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
+     */
+    var assign = createAssigner(baseAssign);
+
     /**
      * Creates an object that inherits from the given `prototype` object. If a
      * `properties` object is provided its own enumerable properties are assigned
@@ -7046,524 +7548,6 @@
       return result;
     }
 
-    /**
-     * Checks if `value` is classified as an `arguments` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
-     * @example
-     *
-     * (function() { return _.isArguments(arguments); })();
-     * // => true
-     *
-     * _.isArguments([1, 2, 3]);
-     * // => false
-     */
-    function isArguments(value) {
-      var length = (value && typeof value == 'object') ? value.length : undefined;
-      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
-        toString.call(value) == argsClass) || false;
-    }
-    // fallback for environments without a `[[Class]]` for `arguments` objects
-    if (!support.argsClass) {
-      isArguments = function(value) {
-        var length = (value && typeof value == 'object') ? value.length : undefined;
-        return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
-          hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee')) || false;
-      };
-    }
-
-    /**
-     * Checks if `value` is classified as an `Array` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isArray([1, 2, 3]);
-     * // => true
-     *
-     * (function() { return _.isArray(arguments); })();
-     * // => false
-     */
-    var isArray = nativeIsArray || function(value) {
-      return (value && typeof value == 'object' && typeof value.length == 'number' &&
-        toString.call(value) == arrayClass) || false;
-    };
-
-    /**
-     * Checks if `value` is classified as a boolean primitive or object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isBoolean(false);
-     * // => true
-     *
-     * _.isBoolean(null);
-     * // => false
-     */
-    function isBoolean(value) {
-      return (value === true || value === false ||
-        value && typeof value == 'object' && toString.call(value) == boolClass) || false;
-    }
-
-    /**
-     * Checks if `value` is classified as a `Date` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isDate(new Date);
-     * // => true
-     *
-     * _.isDate('Mon April 23 2012');
-     * // => false
-     */
-    function isDate(value) {
-      return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
-    }
-
-    /**
-     * Checks if `value` is a DOM element.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
-     * @example
-     *
-     * _.isElement(document.body);
-     * // => true
-     *
-     * _.isElement('<body>');
-     * // => false
-     */
-    function isElement(value) {
-      return (value && typeof value == 'object' && value.nodeType === 1 &&
-        (support.nodeClass ? toString.call(value).indexOf('Element') > -1 : isHostObject(value))) || false;
-    }
-    // fallback for environments without DOM support
-    if (!support.dom) {
-      isElement = function(value) {
-        return (value && typeof value == 'object' && value.nodeType === 1 &&
-          !isPlainObject(value)) || false;
-      };
-    }
-
-    /**
-     * Checks if a collection is empty. A value is considered empty unless it is
-     * an array-like value with a length greater than `0` or an object with own
-     * enumerable properties.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {Array|Object|string} value The value to inspect.
-     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
-     * @example
-     *
-     * _.isEmpty(null);
-     * // => true
-     *
-     * _.isEmpty(true);
-     * // => true
-     *
-     * _.isEmpty(1);
-     * // => true
-     *
-     * _.isEmpty([1, 2, 3]);
-     * // => false
-     *
-     * _.isEmpty({ 'a': 1 });
-     * // => false
-     */
-    function isEmpty(value) {
-      if (value == null) {
-        return true;
-      }
-      var length = value.length;
-      if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
-          (isArray(value) || isString(value) || isArguments(value) ||
-            (typeof value == 'object' && isFunction(value.splice)))) {
-        return !length;
-      }
-      return !keys(value).length;
-    }
-
-    /**
-     * Performs a deep comparison between two values to determine if they are
-     * equivalent. If `customizer` is provided it is invoked to compare values.
-     * If `customizer` returns `undefined` comparisons are handled by the method
-     * instead. The `customizer` is bound to `thisArg` and invoked with three
-     * arguments; (value, other, key).
-     *
-     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
-     * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
-     * are **not** supported. Provide a customizer function to extend support
-     * for comparing other values.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to compare to `other`.
-     * @param {*} other The value to compare to `value`.
-     * @param {Function} [customizer] The function to customize comparing values.
-     * @param {*} [thisArg] The `this` binding of `customizer`.
-     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
-     * @example
-     *
-     * var object = { 'name': 'fred' };
-     * var other = { 'name': 'fred' };
-     *
-     * object == other;
-     * // => false
-     *
-     * _.isEqual(object, other);
-     * // => true
-     *
-     * var words = ['hello', 'goodbye'];
-     * var otherWords = ['hi', 'goodbye'];
-     *
-     * _.isEqual(words, otherWords, function() {
-     *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
-     * });
-     * // => true
-     */
-    function isEqual(value, other, customizer, thisArg) {
-      customizer = typeof customizer == 'function' && baseCallback(customizer, thisArg, 3);
-      return (!customizer && isStrictComparable(value) && isStrictComparable(other))
-        ? value === other
-        : baseIsEqual(value, other, customizer);
-    }
-
-    /**
-     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
-     * `SyntaxError`, `TypeError`, or `URIError` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
-     * @example
-     *
-     * _.isError(new Error);
-     * // => true
-     *
-     * _.isError(Error);
-     * // => false
-     */
-    function isError(value) {
-      return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
-    }
-
-    /**
-     * Checks if `value` is a finite primitive number.
-     *
-     * **Note:** This method is based on ES6 `Number.isFinite`. See the
-     * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
-     * for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
-     * @example
-     *
-     * _.isFinite(10);
-     * // => true
-     *
-     * _.isFinite('10');
-     * // => false
-     *
-     * _.isFinite(true);
-     * // => false
-     *
-     * _.isFinite(Object(10));
-     * // => false
-     *
-     * _.isFinite(Infinity);
-     * // => false
-     */
-    var isFinite = nativeNumIsFinite || function(value) {
-      return typeof value == 'number' && nativeIsFinite(value);
-    };
-
-    /**
-     * Checks if `value` is classified as a `Function` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isFunction(_);
-     * // => true
-     *
-     * _.isFunction(/abc/);
-     * // => false
-     */
-    function isFunction(value) {
-      // avoid a Chakra bug in IE 11
-      // https://github.com/jashkenas/underscore/issues/1621
-      return typeof value == 'function' || false;
-    }
-    // fallback for older versions of Chrome and Safari
-    if (isFunction(/x/)) {
-      isFunction = function(value) {
-        return typeof value == 'function' && toString.call(value) == funcClass;
-      };
-    }
-
-    /**
-     * Checks if `value` is the language type of `Object`.
-     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-     *
-     * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-     * @example
-     *
-     * _.isObject({});
-     * // => true
-     *
-     * _.isObject([1, 2, 3]);
-     * // => true
-     *
-     * _.isObject(1);
-     * // => false
-     */
-    function isObject(value) {
-      // avoid a V8 bug in Chrome 19-20
-      // https://code.google.com/p/v8/issues/detail?id=2291
-      var type = typeof value;
-      return type == 'function' || (value && type == 'object') || false;
-    }
-
-    /**
-     * Checks if `value` is `NaN`.
-     *
-     * **Note:** This method is not the same as native `isNaN` which returns `true`
-     * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
-     * for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
-     * @example
-     *
-     * _.isNaN(NaN);
-     * // => true
-     *
-     * _.isNaN(new Number(NaN));
-     * // => true
-     *
-     * isNaN(undefined);
-     * // => true
-     *
-     * _.isNaN(undefined);
-     * // => false
-     */
-    function isNaN(value) {
-      // `NaN` as a primitive is the only value that is not equal to itself
-      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
-      return isNumber(value) && value != +value;
-    }
-
-    /**
-     * Checks if `value` is a native function.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
-     */
-    function isNative(value) {
-      if (isFunction(value)) {
-        return reNative.test(fnToString.call(value));
-      }
-      return (value && typeof value == 'object' &&
-        (isHostObject(value) ? reNative : reHostCtor).test(value)) || false;
-    }
-
-    /**
-     * Checks if `value` is `null`.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
-     * @example
-     *
-     * _.isNull(null);
-     * // => true
-     *
-     * _.isNull(void 0);
-     * // => false
-     */
-    function isNull(value) {
-      return value === null;
-    }
-
-    /**
-     * Checks if `value` is classified as a `Number` primitive or object.
-     *
-     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
-     * as numbers, use the `_.isFinite` method.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isNumber(8.4);
-     * // => true
-     *
-     * _.isNumber(NaN);
-     * // => true
-     *
-     * _.isNumber('8.4');
-     * // => false
-     */
-    function isNumber(value) {
-      var type = typeof value;
-      return type == 'number' ||
-        (value && type == 'object' && toString.call(value) == numberClass) || false;
-    }
-
-    /**
-     * Checks if `value` is an object created by the `Object` constructor or has
-     * a `[[Prototype]]` of `null`.
-     *
-     * **Note:** This method assumes objects created by the `Object` constructor
-     * have no inherited enumerable properties.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
-     * @example
-     *
-     * function Shape() {
-     *   this.x = 0;
-     *   this.y = 0;
-     * }
-     *
-     * _.isPlainObject(new Shape);
-     * // => false
-     *
-     * _.isPlainObject([1, 2, 3]);
-     * // => false
-     *
-     * _.isPlainObject({ 'x': 0, 'y': 0 });
-     * // => true
-     *
-     * _.isPlainObject(Object.create(null));
-     * // => true
-     */
-    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
-      if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) {
-        return false;
-      }
-      var valueOf = value.valueOf,
-          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
-
-      return objProto
-        ? (value == objProto || getPrototypeOf(value) == objProto)
-        : shimIsPlainObject(value);
-    };
-
-    /**
-     * Checks if `value` is classified as a `RegExp` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isRegExp(/abc/);
-     * // => true
-     *
-     * _.isRegExp('/abc/');
-     * // => false
-     */
-    function isRegExp(value) {
-      return (isObject(value) && toString.call(value) == regexpClass) || false;
-    }
-
-    /**
-     * Checks if `value` is classified as a `String` primitive or object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isString('abc');
-     * // => true
-     *
-     * _.isString(1);
-     * // => false
-     */
-    function isString(value) {
-      return typeof value == 'string' ||
-        (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
-    }
-
-    /**
-     * Checks if `value` is `undefined`.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
-     * @example
-     *
-     * _.isUndefined(void 0);
-     * // => true
-     *
-     * _.isUndefined(null);
-     * // => false
-     */
-    function isUndefined(value) {
-      return typeof value == 'undefined';
-    }
-
     /**
      * Creates an array of the own enumerable property names of `object`.
      *
@@ -7980,7 +7964,7 @@
       return baseValues(object, keysIn);
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Converts `string` to camel case.
@@ -8714,7 +8698,7 @@
         : string;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Attempts to invoke `func`, returning either the result or the caught
@@ -9319,13 +9303,7 @@
       return String(prefix == null ? '' : prefix) + id;
     }
 
-    /*--------------------------------------------------------------------------*/
-
-    // ensure `new lodashWrapper` is an instance of `lodash`
-    lodashWrapper.prototype = lodash.prototype;
-
-    // assign default placeholders
-    bind.placeholder = bindKey.placeholder = curry.placeholder = curryRight.placeholder = partial.placeholder = partialRight.placeholder = lodash;
+    /*------------------------------------------------------------------------*/
 
     // add functions that return wrapped values when chaining
     lodash.after = after;
@@ -9436,7 +9414,7 @@
     // add functions to `lodash.prototype`
     mixin(lodash, baseAssign({}, lodash));
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     // add functions that return unwrapped values when chaining
     lodash.attempt = attempt;
@@ -9531,7 +9509,7 @@
       return source;
     }()), false);
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     // add functions capable of returning wrapped and unwrapped values when chaining
     lodash.sample = sample;
@@ -9550,7 +9528,7 @@
       }
     });
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * The semantic version number.
@@ -9561,12 +9539,18 @@
      */
     lodash.VERSION = VERSION;
 
+    // ensure `new lodashWrapper` is an instance of `lodash`
+    lodashWrapper.prototype = lodash.prototype;
+
     // add "Chaining" functions to the wrapper
     lodash.prototype.chain = wrapperChain;
-    lodash.prototype.toJSON = wrapperValueOf;
     lodash.prototype.toString = wrapperToString;
-    lodash.prototype.value = wrapperValueOf;
-    lodash.prototype.valueOf = wrapperValueOf;
+    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
+
+    // assign default placeholders
+    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
+      lodash[methodName].placeholder = lodash;
+    });
 
     // add `Array` functions that return unwrapped values
     arrayEach(['join', 'pop', 'shift'], function(methodName) {
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index bf061c411..f52700419 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -1,76 +1,76 @@
 /**
  * @license
- * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.6.0 underscorejs.org/LICENSE
+ * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.7.0 underscorejs.org/LICENSE
  * Build: `lodash -o ./dist/lodash.compat.js`
  */
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+return Qt(g,function(t,r){g.prototype[r]||(n[r]=t)}),n}(),false),g.sample=function(n,t,r){return null==t||r?(n=Lr(n),t=n.length,0<t?n[ar(0,t-1)]:_):(n=ue(n),n.length=Au(0>t?0:+t||0,n.length),n)},Qt(g,function(n,t){var r="sample"!=t;g.prototype[t]||(g.prototype[t]=function(t,e){var u=this.__chain__,o=n(this.__wrapped__,t,e);return u||null!=t&&(!e||r&&typeof t=="function")?new J(o,u):o})}),g.VERSION=b,J.prototype=g.prototype,g.prototype.chain=function(){return this.__chain__=true,this},g.prototype.toString=function(){return Ke(this.__wrapped__)
+},g.prototype.toJSON=g.prototype.value=g.prototype.valueOf=function(){return this.__wrapped__},nt("bind bindKey curry curryRight partial partialRight".split(" "),function(n){g[n].placeholder=g}),nt(["join","pop","shift"],function(n){var t=Ye[n];g.prototype[n]=function(){var n=this.__chain__,r=t.apply(this.__wrapped__,arguments);return n?new J(r,n):r}}),nt(["push","reverse","sort","unshift"],function(n){var t=Ye[n];g.prototype[n]=function(){return t.apply(this.__wrapped__,arguments),this}}),nt(["concat","splice"],function(n){var t=Ye[n];
+g.prototype[n]=function(){return new J(t.apply(this.__wrapped__,arguments),this.__chain__)}}),Fu.spliceObjects||nt(["pop","shift","splice"],function(n){var t=Ye[n],r="splice"==n;g.prototype[n]=function(){var n=this.__chain__,e=this.__wrapped__,u=t.apply(e,arguments);return 0===e.length&&delete e[0],n||r?new J(u,n):u}}),g}var _,b="3.0.0-pre",w=1,j=2,A=4,x=8,O=16,E=32,I=64,S=150,C=16,R="Expected a function",k=Math.pow(2,32)-1,F=Math.pow(2,53)-1,U="__lodash_placeholder__",T=0,L=/^[A-Z]+$/,W=/\b__p\+='';/g,N=/\b(__p\+=)''\+/g,$=/(__e\(.*?\)|\b__t\))\+'';/g,P=/&(?:amp|lt|gt|quot|#39|#96);/g,B=/[&<>"'`]/g,D=/<%-([\s\S]+?)%>/g,M=/<%([\s\S]+?)%>/g,z=/<%=([\s\S]+?)%>/g,q=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,Z=/\w*$/,K=/^\s*function[ \n\r\t]+\w/,V=/^0[xX]/,Y=/^\[object .+?Constructor\]$/,J=/[\xC0-\xFF]/g,X=/($^)/,G=/[.*+?^${}()|[\]\/\\]/g,H=/\bthis\b/,Q=/['\n\r\u2028\u2029\\]/g,nt=/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g,tt=" \t\x0B\f\xa0\ufeff\n\r\u2028\u2029\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000",rt="Array ArrayBuffer Date Error Float32Array Float64Array Function Int8Array Int16Array Int32Array Math Number Object RegExp Set String _ clearTimeout document isFinite parseInt setTimeout TypeError Uint8Array Uint8ClampedArray Uint16Array Uint32Array WeakMap window WinRTError".split(" "),et="constructor hasOwnProperty isPrototypeOf propertyIsEnumerable toLocaleString toString valueOf".split(" "),ut="[object Arguments]",ot="[object Array]",it="[object Boolean]",at="[object Date]",ft="[object Error]",ct="[object Function]",lt="[object Number]",st="[object Object]",pt="[object RegExp]",ht="[object String]",gt="[object ArrayBuffer]",vt="[object Float32Array]",yt="[object Float64Array]",mt="[object Int8Array]",dt="[object Int16Array]",_t="[object Int32Array]",bt="[object Uint8Array]",wt="[object Uint8ClampedArray]",jt="[object Uint16Array]",At="[object Uint32Array]",xt={};
+xt[ut]=xt[ot]=xt[vt]=xt[yt]=xt[mt]=xt[dt]=xt[_t]=xt[bt]=xt[wt]=xt[jt]=xt[At]=true,xt[gt]=xt[it]=xt[at]=xt[ft]=xt[ct]=xt["[object Map]"]=xt[lt]=xt[st]=xt[pt]=xt["[object Set]"]=xt[ht]=xt["[object WeakMap]"]=false;var Ot={};Ot[ut]=Ot[ot]=Ot[gt]=Ot[it]=Ot[at]=Ot[vt]=Ot[yt]=Ot[mt]=Ot[dt]=Ot[_t]=Ot[lt]=Ot[st]=Ot[pt]=Ot[ht]=Ot[bt]=Ot[wt]=Ot[jt]=Ot[At]=true,Ot[ft]=Ot[ct]=Ot["[object Map]"]=Ot["[object Set]"]=Ot["[object WeakMap]"]=false;var Et={leading:false,maxWait:0,trailing:false},It={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","`":"&#96;"},St={"&amp;":"&","&lt;":"<","&gt;":">","&quot;":'"',"&#39;":"'","&#96;":"`"},Ct={"\xc0":"A","\xc1":"A","\xc2":"A","\xc3":"A","\xc4":"A","\xc5":"A","\xe0":"a","\xe1":"a","\xe2":"a","\xe3":"a","\xe4":"a","\xe5":"a","\xc7":"C","\xe7":"c","\xd0":"D","\xf0":"d","\xc8":"E","\xc9":"E","\xca":"E","\xcb":"E","\xe8":"e","\xe9":"e","\xea":"e","\xeb":"e","\xcc":"I","\xcd":"I","\xce":"I","\xcf":"I","\xec":"i","\xed":"i","\xee":"i","\xef":"i","\xd1":"N","\xf1":"n","\xd2":"O","\xd3":"O","\xd4":"O","\xd5":"O","\xd6":"O","\xd8":"O","\xf2":"o","\xf3":"o","\xf4":"o","\xf5":"o","\xf6":"o","\xf8":"o","\xd9":"U","\xda":"U","\xdb":"U","\xdc":"U","\xf9":"u","\xfa":"u","\xfb":"u","\xfc":"u","\xdd":"Y","\xfd":"y","\xff":"y","\xc6":"AE","\xe6":"ae","\xde":"Th","\xfe":"th","\xdf":"ss","\xd7":" ","\xf7":" "},Rt={"function":true,object:true},kt={"\\":"\\","'":"'","\n":"n","\r":"r","\u2028":"u2028","\u2029":"u2029"},Ft=Rt[typeof window]&&window||this,Ut=Rt[typeof exports]&&exports&&!exports.nodeType&&exports,Rt=Rt[typeof module]&&module&&!module.nodeType&&module,Tt=Ut&&Rt&&typeof global=="object"&&global;
+!Tt||Tt.global!==Tt&&Tt.window!==Tt&&Tt.self!==Tt||(Ft=Tt);var Tt=Rt&&Rt.exports===Ut&&Ut,Lt=function(){try{({toString:0}+"")}catch(n){return function(){return false}}return function(n){return typeof n.toString!="function"&&typeof(n+"")=="string"}}(),Wt=d();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(Ft._=Wt, define(function(){return Wt})):Ut&&Rt?Tt?(Rt.exports=Wt)._=Wt:Ut._=Wt:Ft._=Wt}).call(this);
\ No newline at end of file
diff --git a/dist/lodash.js b/dist/lodash.js
index 4cc42a490..08af34a85 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -3,7 +3,7 @@
  * Lo-Dash 3.0.0-pre (Custom Build) <http://lodash.com/>
  * Build: `lodash modern -o ./dist/lodash.js`
  * Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.6.0 <http://underscorejs.org/LICENSE>
+ * Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
  * Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <http://lodash.com/license>
  */
@@ -28,9 +28,6 @@
   var HOT_COUNT = 150,
       HOT_SPAN = 16;
 
-  /** Used as the property name for wrapper metadata */
-  var EXPANDO = '__lodash_' + VERSION.replace(/[-.]/g, '_') + '__';
-
   /** Used as the TypeError message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
@@ -196,14 +193,6 @@
     'trailing': false
   };
 
-  /** Used as the property descriptor for wrapper metadata */
-  var descriptor = {
-    'configurable': false,
-    'enumerable': false,
-    'value': null,
-    'writable': false
-  };
-
   /**
    * Used to convert characters to HTML entities.
    *
@@ -694,17 +683,6 @@
       return result;
     }());
 
-    /** Used to set metadata on functions */
-    var defineProperty = (function() {
-      // IE 8 only accepts DOM elements
-      try {
-        var o = {},
-            func = isNative(func = Object.defineProperty) && func,
-            result = func(o, o, o) && func;
-      } catch(e) {}
-      return result;
-    }());
-
     /* Native method references for those with the same name as other `lodash` methods */
     var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
         nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
@@ -723,7 +701,7 @@
     /** Used to store function metadata */
     var metaMap = WeakMap && new WeakMap;
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a `lodash` object which wraps the given value to enable intuitive
@@ -939,7 +917,7 @@
       }
     };
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * A specialized version of `_.forEach` for arrays without support for
@@ -1988,7 +1966,7 @@
         var data = getData(func),
             arity = data ? data[2] : func.length;
 
-        arity -= args.length;
+        arity = nativeMax(arity - args.length, 0);
       }
       return (bitmask & PARTIAL_FLAG)
         ? createWrapper(func, bitmask, arity, thisArg, args, holders)
@@ -2063,19 +2041,10 @@
      * @param {*} data The metadata.
      * @returns {Function} Returns `func`.
      */
-    function baseSetData(func, data) {
+    var baseSetData = !metaMap ? identity : function(func, data) {
       metaMap.set(func, data);
       return func;
-    }
-    // fallback for environments without `WeakMap`
-    if (!WeakMap) {
-      baseSetData = !defineProperty ? identity : function(func, value) {
-        descriptor.value = value;
-        defineProperty(func, EXPANDO, descriptor);
-        descriptor.value = null;
-        return func;
-      };
-    }
+    };
 
     /**
      * The base implementation of `_.some` without support for callback shorthands
@@ -2668,15 +2637,9 @@
      * @param {Function} func The function to query.
      * @returns {*} Returns the metadata for `func`.
      */
-    function getData(func) {
+    var getData = !metaMap ? noop : function(func) {
       return metaMap.get(func);
-    }
-    // fallback for environments without `WeakMap`
-    if (!WeakMap) {
-      getData = !defineProperty ? noop : function(func) {
-        return func[EXPANDO];
-      };
-    }
+    };
 
     /**
      * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
@@ -3011,7 +2974,7 @@
       return isObject(value) ? value : Object(value);
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates an array of elements split into groups the length of `size`.
@@ -4282,7 +4245,7 @@
       return result;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a `lodash` object that wraps `value` with explicit method
@@ -4403,7 +4366,7 @@
       return this.__wrapped__;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates an array of elements corresponding to the specified keys, or indexes,
@@ -5546,7 +5509,7 @@
       return filter(collection, matches(source));
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * The opposite of `_.before`; this method creates a function that invokes
@@ -5573,7 +5536,13 @@
      */
     function after(n, func) {
       if (!isFunction(func)) {
-        throw new TypeError(FUNC_ERROR_TEXT);
+        if (isFunction(n)) {
+          var temp = n;
+          n = func;
+          func = temp;
+        } else {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
       }
       n = nativeIsFinite(n = +n) ? n : 0;
       return function() {
@@ -5601,7 +5570,13 @@
     function before(n, func) {
       var result;
       if (!isFunction(func)) {
-        throw new TypeError(FUNC_ERROR_TEXT);
+        if (isFunction(n)) {
+          var temp = n;
+          n = func;
+          func = temp;
+        } else {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
       }
       return function() {
         if (--n > 0) {
@@ -6359,37 +6334,7 @@
       return basePartial(wrapper, PARTIAL_FLAG, [value], []);
     }
 
-    /*--------------------------------------------------------------------------*/
-
-    /**
-     * Assigns own enumerable properties of source object(s) to the destination
-     * object. Subsequent sources overwrite property assignments of previous sources.
-     * If `customizer` is provided it is invoked to produce the assigned values.
-     * The `customizer` is bound to `thisArg` and invoked with five arguments;
-     * (objectValue, sourceValue, key, object, source).
-     *
-     * @static
-     * @memberOf _
-     * @alias extend
-     * @category Object
-     * @param {Object} object The destination object.
-     * @param {...Object} [sources] The source objects.
-     * @param {Function} [customizer] The function to customize assigning values.
-     * @param {*} [thisArg] The `this` binding of `customizer`.
-     * @returns {Object} Returns the destination object.
-     * @example
-     *
-     * _.assign({ 'name': 'fred' }, { 'age': 40 }, { 'employer': 'slate' });
-     * // => { 'name': 'fred', 'age': 40, 'employer': 'slate' }
-     *
-     * var defaults = _.partialRight(_.assign, function(value, other) {
-     *   return typeof value == 'undefined' ? other : value;
-     * });
-     *
-     * defaults({ 'name': 'barney' }, { 'age': 36 }, { 'name': 'fred', 'employer': 'slate' });
-     * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
-     */
-    var assign = createAssigner(baseAssign);
+    /*------------------------------------------------------------------------*/
 
     /**
      * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
@@ -6406,7 +6351,7 @@
      *
      * @static
      * @memberOf _
-     * @category Object
+     * @category Lang
      * @param {*} value The value to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
@@ -6469,7 +6414,7 @@
      *
      * @static
      * @memberOf _
-     * @category Object
+     * @category Lang
      * @param {*} value The value to deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
      * @param {*} [thisArg] The `this` binding of `customizer`.
@@ -6502,6 +6447,548 @@
       return baseClone(value, true, customizer);
     }
 
+    /**
+     * Checks if `value` is classified as an `arguments` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+     * @example
+     *
+     * (function() { return _.isArguments(arguments); })();
+     * // => true
+     *
+     * _.isArguments([1, 2, 3]);
+     * // => false
+     */
+    function isArguments(value) {
+      var length = (value && typeof value == 'object') ? value.length : undefined;
+      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
+        toString.call(value) == argsClass) || false;
+    }
+
+    /**
+     * Checks if `value` is classified as an `Array` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isArray([1, 2, 3]);
+     * // => true
+     *
+     * (function() { return _.isArray(arguments); })();
+     * // => false
+     */
+    var isArray = nativeIsArray || function(value) {
+      return (value && typeof value == 'object' && typeof value.length == 'number' &&
+        toString.call(value) == arrayClass) || false;
+    };
+
+    /**
+     * Checks if `value` is classified as a boolean primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isBoolean(false);
+     * // => true
+     *
+     * _.isBoolean(null);
+     * // => false
+     */
+    function isBoolean(value) {
+      return (value === true || value === false ||
+        value && typeof value == 'object' && toString.call(value) == boolClass) || false;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Date` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isDate(new Date);
+     * // => true
+     *
+     * _.isDate('Mon April 23 2012');
+     * // => false
+     */
+    function isDate(value) {
+      return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
+    }
+
+    /**
+     * Checks if `value` is a DOM element.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+     * @example
+     *
+     * _.isElement(document.body);
+     * // => true
+     *
+     * _.isElement('<body>');
+     * // => false
+     */
+    function isElement(value) {
+      return (value && typeof value == 'object' && value.nodeType === 1 &&
+        toString.call(value).indexOf('Element') > -1) || false;
+    }
+    // fallback for environments without DOM support
+    if (!support.dom) {
+      isElement = function(value) {
+        return (value && typeof value == 'object' && value.nodeType === 1 &&
+          !isPlainObject(value)) || false;
+      };
+    }
+
+    /**
+     * Checks if a collection is empty. A value is considered empty unless it is
+     * an array-like value with a length greater than `0` or an object with own
+     * enumerable properties.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {Array|Object|string} value The value to inspect.
+     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+     * @example
+     *
+     * _.isEmpty(null);
+     * // => true
+     *
+     * _.isEmpty(true);
+     * // => true
+     *
+     * _.isEmpty(1);
+     * // => true
+     *
+     * _.isEmpty([1, 2, 3]);
+     * // => false
+     *
+     * _.isEmpty({ 'a': 1 });
+     * // => false
+     */
+    function isEmpty(value) {
+      if (value == null) {
+        return true;
+      }
+      var length = value.length;
+      if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
+          (isArray(value) || isString(value) || isArguments(value) ||
+            (typeof value == 'object' && isFunction(value.splice)))) {
+        return !length;
+      }
+      return !keys(value).length;
+    }
+
+    /**
+     * Performs a deep comparison between two values to determine if they are
+     * equivalent. If `customizer` is provided it is invoked to compare values.
+     * If `customizer` returns `undefined` comparisons are handled by the method
+     * instead. The `customizer` is bound to `thisArg` and invoked with three
+     * arguments; (value, other, key).
+     *
+     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
+     * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
+     * are **not** supported. Provide a customizer function to extend support
+     * for comparing other values.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to compare to `other`.
+     * @param {*} other The value to compare to `value`.
+     * @param {Function} [customizer] The function to customize comparing values.
+     * @param {*} [thisArg] The `this` binding of `customizer`.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * var other = { 'name': 'fred' };
+     *
+     * object == other;
+     * // => false
+     *
+     * _.isEqual(object, other);
+     * // => true
+     *
+     * var words = ['hello', 'goodbye'];
+     * var otherWords = ['hi', 'goodbye'];
+     *
+     * _.isEqual(words, otherWords, function() {
+     *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
+     * });
+     * // => true
+     */
+    function isEqual(value, other, customizer, thisArg) {
+      customizer = typeof customizer == 'function' && baseCallback(customizer, thisArg, 3);
+      return (!customizer && isStrictComparable(value) && isStrictComparable(other))
+        ? value === other
+        : baseIsEqual(value, other, customizer);
+    }
+
+    /**
+     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+     * `SyntaxError`, `TypeError`, or `URIError` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+     * @example
+     *
+     * _.isError(new Error);
+     * // => true
+     *
+     * _.isError(Error);
+     * // => false
+     */
+    function isError(value) {
+      return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
+    }
+
+    /**
+     * Checks if `value` is a finite primitive number.
+     *
+     * **Note:** This method is based on ES6 `Number.isFinite`. See the
+     * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
+     * for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+     * @example
+     *
+     * _.isFinite(10);
+     * // => true
+     *
+     * _.isFinite('10');
+     * // => false
+     *
+     * _.isFinite(true);
+     * // => false
+     *
+     * _.isFinite(Object(10));
+     * // => false
+     *
+     * _.isFinite(Infinity);
+     * // => false
+     */
+    var isFinite = nativeNumIsFinite || function(value) {
+      return typeof value == 'number' && nativeIsFinite(value);
+    };
+
+    /**
+     * Checks if `value` is classified as a `Function` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isFunction(_);
+     * // => true
+     *
+     * _.isFunction(/abc/);
+     * // => false
+     */
+    function isFunction(value) {
+      // avoid a Chakra bug in IE 11
+      // https://github.com/jashkenas/underscore/issues/1621
+      return typeof value == 'function' || false;
+    }
+
+    /**
+     * Checks if `value` is the language type of `Object`.
+     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+     *
+     * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+     * @example
+     *
+     * _.isObject({});
+     * // => true
+     *
+     * _.isObject([1, 2, 3]);
+     * // => true
+     *
+     * _.isObject(1);
+     * // => false
+     */
+    function isObject(value) {
+      // avoid a V8 bug in Chrome 19-20
+      // https://code.google.com/p/v8/issues/detail?id=2291
+      var type = typeof value;
+      return type == 'function' || (value && type == 'object') || false;
+    }
+
+    /**
+     * Checks if `value` is `NaN`.
+     *
+     * **Note:** This method is not the same as native `isNaN` which returns `true`
+     * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
+     * for more details.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+     * @example
+     *
+     * _.isNaN(NaN);
+     * // => true
+     *
+     * _.isNaN(new Number(NaN));
+     * // => true
+     *
+     * isNaN(undefined);
+     * // => true
+     *
+     * _.isNaN(undefined);
+     * // => false
+     */
+    function isNaN(value) {
+      // `NaN` as a primitive is the only value that is not equal to itself
+      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
+      return isNumber(value) && value != +value;
+    }
+
+    /**
+     * Checks if `value` is a native function.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
+     * @example
+     *
+     * _.isNative(Array.prototype.push);
+     * // => true
+     *
+     * _.isNative(_);
+     * // => false
+     */
+    function isNative(value) {
+      if (isFunction(value)) {
+        return reNative.test(fnToString.call(value));
+      }
+      return (value && typeof value == 'object' && reHostCtor.test(value)) || false;
+    }
+
+    /**
+     * Checks if `value` is `null`.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+     * @example
+     *
+     * _.isNull(null);
+     * // => true
+     *
+     * _.isNull(void 0);
+     * // => false
+     */
+    function isNull(value) {
+      return value === null;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Number` primitive or object.
+     *
+     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
+     * as numbers, use the `_.isFinite` method.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isNumber(8.4);
+     * // => true
+     *
+     * _.isNumber(NaN);
+     * // => true
+     *
+     * _.isNumber('8.4');
+     * // => false
+     */
+    function isNumber(value) {
+      var type = typeof value;
+      return type == 'number' ||
+        (value && type == 'object' && toString.call(value) == numberClass) || false;
+    }
+
+    /**
+     * Checks if `value` is an object created by the `Object` constructor or has
+     * a `[[Prototype]]` of `null`.
+     *
+     * **Note:** This method assumes objects created by the `Object` constructor
+     * have no inherited enumerable properties.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * _.isPlainObject(new Shape);
+     * // => false
+     *
+     * _.isPlainObject([1, 2, 3]);
+     * // => false
+     *
+     * _.isPlainObject({ 'x': 0, 'y': 0 });
+     * // => true
+     *
+     * _.isPlainObject(Object.create(null));
+     * // => true
+     */
+    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
+      if (!(value && toString.call(value) == objectClass)) {
+        return false;
+      }
+      var valueOf = value.valueOf,
+          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
+
+      return objProto
+        ? (value == objProto || getPrototypeOf(value) == objProto)
+        : shimIsPlainObject(value);
+    };
+
+    /**
+     * Checks if `value` is classified as a `RegExp` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isRegExp(/abc/);
+     * // => true
+     *
+     * _.isRegExp('/abc/');
+     * // => false
+     */
+    function isRegExp(value) {
+      return (value && typeof value == 'object' && toString.call(value) == regexpClass) || false;
+    }
+
+    /**
+     * Checks if `value` is classified as a `String` primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+     * @example
+     *
+     * _.isString('abc');
+     * // => true
+     *
+     * _.isString(1);
+     * // => false
+     */
+    function isString(value) {
+      return typeof value == 'string' ||
+        (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
+    }
+
+    /**
+     * Checks if `value` is `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+     * @example
+     *
+     * _.isUndefined(void 0);
+     * // => true
+     *
+     * _.isUndefined(null);
+     * // => false
+     */
+    function isUndefined(value) {
+      return typeof value == 'undefined';
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Assigns own enumerable properties of source object(s) to the destination
+     * object. Subsequent sources overwrite property assignments of previous sources.
+     * If `customizer` is provided it is invoked to produce the assigned values.
+     * The `customizer` is bound to `thisArg` and invoked with five arguments;
+     * (objectValue, sourceValue, key, object, source).
+     *
+     * @static
+     * @memberOf _
+     * @alias extend
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @param {Function} [customizer] The function to customize assigning values.
+     * @param {*} [thisArg] The `this` binding of `customizer`.
+     * @returns {Object} Returns the destination object.
+     * @example
+     *
+     * _.assign({ 'name': 'fred' }, { 'age': 40 }, { 'employer': 'slate' });
+     * // => { 'name': 'fred', 'age': 40, 'employer': 'slate' }
+     *
+     * var defaults = _.partialRight(_.assign, function(value, other) {
+     *   return typeof value == 'undefined' ? other : value;
+     * });
+     *
+     * defaults({ 'name': 'barney' }, { 'age': 36 }, { 'name': 'fred', 'employer': 'slate' });
+     * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
+     */
+    var assign = createAssigner(baseAssign);
+
     /**
      * Creates an object that inherits from the given `prototype` object. If a
      * `properties` object is provided its own enumerable properties are assigned
@@ -6859,509 +7346,6 @@
       return result;
     }
 
-    /**
-     * Checks if `value` is classified as an `arguments` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
-     * @example
-     *
-     * (function() { return _.isArguments(arguments); })();
-     * // => true
-     *
-     * _.isArguments([1, 2, 3]);
-     * // => false
-     */
-    function isArguments(value) {
-      var length = (value && typeof value == 'object') ? value.length : undefined;
-      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
-        toString.call(value) == argsClass) || false;
-    }
-
-    /**
-     * Checks if `value` is classified as an `Array` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isArray([1, 2, 3]);
-     * // => true
-     *
-     * (function() { return _.isArray(arguments); })();
-     * // => false
-     */
-    var isArray = nativeIsArray || function(value) {
-      return (value && typeof value == 'object' && typeof value.length == 'number' &&
-        toString.call(value) == arrayClass) || false;
-    };
-
-    /**
-     * Checks if `value` is classified as a boolean primitive or object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isBoolean(false);
-     * // => true
-     *
-     * _.isBoolean(null);
-     * // => false
-     */
-    function isBoolean(value) {
-      return (value === true || value === false ||
-        value && typeof value == 'object' && toString.call(value) == boolClass) || false;
-    }
-
-    /**
-     * Checks if `value` is classified as a `Date` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isDate(new Date);
-     * // => true
-     *
-     * _.isDate('Mon April 23 2012');
-     * // => false
-     */
-    function isDate(value) {
-      return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
-    }
-
-    /**
-     * Checks if `value` is a DOM element.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
-     * @example
-     *
-     * _.isElement(document.body);
-     * // => true
-     *
-     * _.isElement('<body>');
-     * // => false
-     */
-    function isElement(value) {
-      return (value && typeof value == 'object' && value.nodeType === 1 &&
-        toString.call(value).indexOf('Element') > -1) || false;
-    }
-    // fallback for environments without DOM support
-    if (!support.dom) {
-      isElement = function(value) {
-        return (value && typeof value == 'object' && value.nodeType === 1 &&
-          !isPlainObject(value)) || false;
-      };
-    }
-
-    /**
-     * Checks if a collection is empty. A value is considered empty unless it is
-     * an array-like value with a length greater than `0` or an object with own
-     * enumerable properties.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {Array|Object|string} value The value to inspect.
-     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
-     * @example
-     *
-     * _.isEmpty(null);
-     * // => true
-     *
-     * _.isEmpty(true);
-     * // => true
-     *
-     * _.isEmpty(1);
-     * // => true
-     *
-     * _.isEmpty([1, 2, 3]);
-     * // => false
-     *
-     * _.isEmpty({ 'a': 1 });
-     * // => false
-     */
-    function isEmpty(value) {
-      if (value == null) {
-        return true;
-      }
-      var length = value.length;
-      if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
-          (isArray(value) || isString(value) || isArguments(value) ||
-            (typeof value == 'object' && isFunction(value.splice)))) {
-        return !length;
-      }
-      return !keys(value).length;
-    }
-
-    /**
-     * Performs a deep comparison between two values to determine if they are
-     * equivalent. If `customizer` is provided it is invoked to compare values.
-     * If `customizer` returns `undefined` comparisons are handled by the method
-     * instead. The `customizer` is bound to `thisArg` and invoked with three
-     * arguments; (value, other, key).
-     *
-     * **Note:** This method supports comparing arrays, booleans, `Date` objects,
-     * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
-     * are **not** supported. Provide a customizer function to extend support
-     * for comparing other values.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to compare to `other`.
-     * @param {*} other The value to compare to `value`.
-     * @param {Function} [customizer] The function to customize comparing values.
-     * @param {*} [thisArg] The `this` binding of `customizer`.
-     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
-     * @example
-     *
-     * var object = { 'name': 'fred' };
-     * var other = { 'name': 'fred' };
-     *
-     * object == other;
-     * // => false
-     *
-     * _.isEqual(object, other);
-     * // => true
-     *
-     * var words = ['hello', 'goodbye'];
-     * var otherWords = ['hi', 'goodbye'];
-     *
-     * _.isEqual(words, otherWords, function() {
-     *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
-     * });
-     * // => true
-     */
-    function isEqual(value, other, customizer, thisArg) {
-      customizer = typeof customizer == 'function' && baseCallback(customizer, thisArg, 3);
-      return (!customizer && isStrictComparable(value) && isStrictComparable(other))
-        ? value === other
-        : baseIsEqual(value, other, customizer);
-    }
-
-    /**
-     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
-     * `SyntaxError`, `TypeError`, or `URIError` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
-     * @example
-     *
-     * _.isError(new Error);
-     * // => true
-     *
-     * _.isError(Error);
-     * // => false
-     */
-    function isError(value) {
-      return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
-    }
-
-    /**
-     * Checks if `value` is a finite primitive number.
-     *
-     * **Note:** This method is based on ES6 `Number.isFinite`. See the
-     * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
-     * for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
-     * @example
-     *
-     * _.isFinite(10);
-     * // => true
-     *
-     * _.isFinite('10');
-     * // => false
-     *
-     * _.isFinite(true);
-     * // => false
-     *
-     * _.isFinite(Object(10));
-     * // => false
-     *
-     * _.isFinite(Infinity);
-     * // => false
-     */
-    var isFinite = nativeNumIsFinite || function(value) {
-      return typeof value == 'number' && nativeIsFinite(value);
-    };
-
-    /**
-     * Checks if `value` is classified as a `Function` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isFunction(_);
-     * // => true
-     *
-     * _.isFunction(/abc/);
-     * // => false
-     */
-    function isFunction(value) {
-      // avoid a Chakra bug in IE 11
-      // https://github.com/jashkenas/underscore/issues/1621
-      return typeof value == 'function' || false;
-    }
-
-    /**
-     * Checks if `value` is the language type of `Object`.
-     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-     *
-     * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-     * @example
-     *
-     * _.isObject({});
-     * // => true
-     *
-     * _.isObject([1, 2, 3]);
-     * // => true
-     *
-     * _.isObject(1);
-     * // => false
-     */
-    function isObject(value) {
-      // avoid a V8 bug in Chrome 19-20
-      // https://code.google.com/p/v8/issues/detail?id=2291
-      var type = typeof value;
-      return type == 'function' || (value && type == 'object') || false;
-    }
-
-    /**
-     * Checks if `value` is `NaN`.
-     *
-     * **Note:** This method is not the same as native `isNaN` which returns `true`
-     * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
-     * for more details.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
-     * @example
-     *
-     * _.isNaN(NaN);
-     * // => true
-     *
-     * _.isNaN(new Number(NaN));
-     * // => true
-     *
-     * isNaN(undefined);
-     * // => true
-     *
-     * _.isNaN(undefined);
-     * // => false
-     */
-    function isNaN(value) {
-      // `NaN` as a primitive is the only value that is not equal to itself
-      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
-      return isNumber(value) && value != +value;
-    }
-
-    /**
-     * Checks if `value` is a native function.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
-     */
-    function isNative(value) {
-      if (isFunction(value)) {
-        return reNative.test(fnToString.call(value));
-      }
-      return (value && typeof value == 'object' && reHostCtor.test(value)) || false;
-    }
-
-    /**
-     * Checks if `value` is `null`.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
-     * @example
-     *
-     * _.isNull(null);
-     * // => true
-     *
-     * _.isNull(void 0);
-     * // => false
-     */
-    function isNull(value) {
-      return value === null;
-    }
-
-    /**
-     * Checks if `value` is classified as a `Number` primitive or object.
-     *
-     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
-     * as numbers, use the `_.isFinite` method.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isNumber(8.4);
-     * // => true
-     *
-     * _.isNumber(NaN);
-     * // => true
-     *
-     * _.isNumber('8.4');
-     * // => false
-     */
-    function isNumber(value) {
-      var type = typeof value;
-      return type == 'number' ||
-        (value && type == 'object' && toString.call(value) == numberClass) || false;
-    }
-
-    /**
-     * Checks if `value` is an object created by the `Object` constructor or has
-     * a `[[Prototype]]` of `null`.
-     *
-     * **Note:** This method assumes objects created by the `Object` constructor
-     * have no inherited enumerable properties.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
-     * @example
-     *
-     * function Shape() {
-     *   this.x = 0;
-     *   this.y = 0;
-     * }
-     *
-     * _.isPlainObject(new Shape);
-     * // => false
-     *
-     * _.isPlainObject([1, 2, 3]);
-     * // => false
-     *
-     * _.isPlainObject({ 'x': 0, 'y': 0 });
-     * // => true
-     *
-     * _.isPlainObject(Object.create(null));
-     * // => true
-     */
-    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
-      if (!(value && toString.call(value) == objectClass)) {
-        return false;
-      }
-      var valueOf = value.valueOf,
-          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
-
-      return objProto
-        ? (value == objProto || getPrototypeOf(value) == objProto)
-        : shimIsPlainObject(value);
-    };
-
-    /**
-     * Checks if `value` is classified as a `RegExp` object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isRegExp(/abc/);
-     * // => true
-     *
-     * _.isRegExp('/abc/');
-     * // => false
-     */
-    function isRegExp(value) {
-      return (value && typeof value == 'object' && toString.call(value) == regexpClass) || false;
-    }
-
-    /**
-     * Checks if `value` is classified as a `String` primitive or object.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-     * @example
-     *
-     * _.isString('abc');
-     * // => true
-     *
-     * _.isString(1);
-     * // => false
-     */
-    function isString(value) {
-      return typeof value == 'string' ||
-        (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
-    }
-
-    /**
-     * Checks if `value` is `undefined`.
-     *
-     * @static
-     * @memberOf _
-     * @category Object
-     * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
-     * @example
-     *
-     * _.isUndefined(void 0);
-     * // => true
-     *
-     * _.isUndefined(null);
-     * // => false
-     */
-    function isUndefined(value) {
-      return typeof value == 'undefined';
-    }
-
     /**
      * Creates an array of the own enumerable property names of `object`.
      *
@@ -7753,7 +7737,7 @@
       return baseValues(object, keysIn);
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Converts `string` to camel case.
@@ -8487,7 +8471,7 @@
         : string;
     }
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * Attempts to invoke `func`, returning either the result or the caught
@@ -9092,13 +9076,7 @@
       return String(prefix == null ? '' : prefix) + id;
     }
 
-    /*--------------------------------------------------------------------------*/
-
-    // ensure `new lodashWrapper` is an instance of `lodash`
-    lodashWrapper.prototype = lodash.prototype;
-
-    // assign default placeholders
-    bind.placeholder = bindKey.placeholder = curry.placeholder = curryRight.placeholder = partial.placeholder = partialRight.placeholder = lodash;
+    /*------------------------------------------------------------------------*/
 
     // add functions that return wrapped values when chaining
     lodash.after = after;
@@ -9209,7 +9187,7 @@
     // add functions to `lodash.prototype`
     mixin(lodash, baseAssign({}, lodash));
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     // add functions that return unwrapped values when chaining
     lodash.attempt = attempt;
@@ -9304,7 +9282,7 @@
       return source;
     }()), false);
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     // add functions capable of returning wrapped and unwrapped values when chaining
     lodash.sample = sample;
@@ -9323,7 +9301,7 @@
       }
     });
 
-    /*--------------------------------------------------------------------------*/
+    /*------------------------------------------------------------------------*/
 
     /**
      * The semantic version number.
@@ -9334,12 +9312,18 @@
      */
     lodash.VERSION = VERSION;
 
+    // ensure `new lodashWrapper` is an instance of `lodash`
+    lodashWrapper.prototype = lodash.prototype;
+
     // add "Chaining" functions to the wrapper
     lodash.prototype.chain = wrapperChain;
-    lodash.prototype.toJSON = wrapperValueOf;
     lodash.prototype.toString = wrapperToString;
-    lodash.prototype.value = wrapperValueOf;
-    lodash.prototype.valueOf = wrapperValueOf;
+    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
+
+    // assign default placeholders
+    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
+      lodash[methodName].placeholder = lodash;
+    });
 
     // add `Array` functions that return unwrapped values
     arrayEach(['join', 'pop', 'shift'], function(methodName) {
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 8a9458147..8df3e5fc6 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -1,72 +1,73 @@
 /**
  * @license
- * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.6.0 underscorejs.org/LICENSE
+ * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.7.0 underscorejs.org/LICENSE
  * Build: `lodash modern -o ./dist/lodash.js`
  */
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+g.prototype[n]=function(){return new J(t.apply(this.__wrapped__,arguments),this.__chain__)}}),g}var b,_="3.0.0-pre",w=1,j=2,A=4,x=8,E=16,O=32,I=64,R=150,k=16,S="Expected a function",C=Math.pow(2,32)-1,F=Math.pow(2,53)-1,T="__lodash_placeholder__",U=0,W=/^[A-Z]+$/,N=/\b__p\+='';/g,L=/\b(__p\+=)''\+/g,$=/(__e\(.*?\)|\b__t\))\+'';/g,B=/&(?:amp|lt|gt|quot|#39|#96);/g,D=/[&<>"'`]/g,M=/<%-([\s\S]+?)%>/g,z=/<%([\s\S]+?)%>/g,q=/<%=([\s\S]+?)%>/g,Z=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,K=/\w*$/,P=/^\s*function[ \n\r\t]+\w/,V=/^0[xX]/,Y=/^\[object .+?Constructor\]$/,J=/[\xC0-\xFF]/g,X=/($^)/,G=/[.*+?^${}()|[\]\/\\]/g,H=/\bthis\b/,Q=/['\n\r\u2028\u2029\\]/g,nt=/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g,tt=" \t\x0B\f\xa0\ufeff\n\r\u2028\u2029\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000",rt="Array ArrayBuffer Date Error Float32Array Float64Array Function Int8Array Int16Array Int32Array Math Number Object RegExp Set String _ clearTimeout document isFinite parseInt setTimeout TypeError Uint8Array Uint8ClampedArray Uint16Array Uint32Array WeakMap window WinRTError".split(" "),et="[object Arguments]",ut="[object Array]",ot="[object Boolean]",it="[object Date]",ft="[object Error]",at="[object Number]",ct="[object Object]",lt="[object RegExp]",pt="[object String]",st="[object ArrayBuffer]",ht="[object Float32Array]",gt="[object Float64Array]",vt="[object Int8Array]",yt="[object Int16Array]",dt="[object Int32Array]",mt="[object Uint8Array]",bt="[object Uint8ClampedArray]",_t="[object Uint16Array]",wt="[object Uint32Array]",jt={};
+jt[et]=jt[ut]=jt[ht]=jt[gt]=jt[vt]=jt[yt]=jt[dt]=jt[mt]=jt[bt]=jt[_t]=jt[wt]=true,jt[st]=jt[ot]=jt[it]=jt[ft]=jt["[object Function]"]=jt["[object Map]"]=jt[at]=jt[ct]=jt[lt]=jt["[object Set]"]=jt[pt]=jt["[object WeakMap]"]=false;var At={};At[et]=At[ut]=At[st]=At[ot]=At[it]=At[ht]=At[gt]=At[vt]=At[yt]=At[dt]=At[at]=At[ct]=At[lt]=At[pt]=At[mt]=At[bt]=At[_t]=At[wt]=true,At[ft]=At["[object Function]"]=At["[object Map]"]=At["[object Set]"]=At["[object WeakMap]"]=false;var xt={leading:false,maxWait:0,trailing:false},Et={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","`":"&#96;"},Ot={"&amp;":"&","&lt;":"<","&gt;":">","&quot;":'"',"&#39;":"'","&#96;":"`"},It={"\xc0":"A","\xc1":"A","\xc2":"A","\xc3":"A","\xc4":"A","\xc5":"A","\xe0":"a","\xe1":"a","\xe2":"a","\xe3":"a","\xe4":"a","\xe5":"a","\xc7":"C","\xe7":"c","\xd0":"D","\xf0":"d","\xc8":"E","\xc9":"E","\xca":"E","\xcb":"E","\xe8":"e","\xe9":"e","\xea":"e","\xeb":"e","\xcc":"I","\xcd":"I","\xce":"I","\xcf":"I","\xec":"i","\xed":"i","\xee":"i","\xef":"i","\xd1":"N","\xf1":"n","\xd2":"O","\xd3":"O","\xd4":"O","\xd5":"O","\xd6":"O","\xd8":"O","\xf2":"o","\xf3":"o","\xf4":"o","\xf5":"o","\xf6":"o","\xf8":"o","\xd9":"U","\xda":"U","\xdb":"U","\xdc":"U","\xf9":"u","\xfa":"u","\xfb":"u","\xfc":"u","\xdd":"Y","\xfd":"y","\xff":"y","\xc6":"AE","\xe6":"ae","\xde":"Th","\xfe":"th","\xdf":"ss","\xd7":" ","\xf7":" "},Rt={"function":true,object:true},kt={"\\":"\\","'":"'","\n":"n","\r":"r","\u2028":"u2028","\u2029":"u2029"},St=Rt[typeof window]&&window||this,Ct=Rt[typeof exports]&&exports&&!exports.nodeType&&exports,Rt=Rt[typeof module]&&module&&!module.nodeType&&module,Ft=Ct&&Rt&&typeof global=="object"&&global;
+!Ft||Ft.global!==Ft&&Ft.window!==Ft&&Ft.self!==Ft||(St=Ft);var Ft=Rt&&Rt.exports===Ct&&Ct,Tt=m();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(St._=Tt, define(function(){return Tt})):Ct&&Rt?Ft?(Rt.exports=Tt)._=Tt:Ct._=Tt:St._=Tt}).call(this);
\ No newline at end of file
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 1aed620b0..9b4a725aa 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -15,6 +15,9 @@
   /** Used as the semantic version number */
   var VERSION = '3.0.0-pre';
 
+  /** Used by methods to exit iteration */
+  var BREAK_INDICATOR = '__lodash_breaker__';
+
   /** Used to compose bitmasks for wrapper metadata */
   var BIND_FLAG = 1,
       BIND_KEY_FLAG = 2,
@@ -23,12 +26,6 @@
       CURRY_BOUND_FLAG = 16,
       PARTIAL_FLAG = 32;
 
-  /** Used as the property name for wrapper metadata */
-  var EXPANDO = '__lodash_' + VERSION.replace(/[-.]/g, '_') + '__';
-
-  /** Used by methods to exit iteration */
-  var breakIndicator = EXPANDO + 'breaker__';
-
   /** Used as the TypeError message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
@@ -333,7 +330,7 @@
       nativeNow = isNative(nativeNow = Date.now) && nativeNow,
       nativeRandom = Math.random;
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Creates a `lodash` object which wraps the given value to enable intuitive
@@ -495,7 +492,7 @@
     'variable': ''
   };
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * A specialized version of `_.forEach` for arrays without support for
@@ -511,7 +508,7 @@
         length = array.length;
 
     while (++index < length) {
-      if (iteratee(array[index], index, array) === breakIndicator) {
+      if (iteratee(array[index], index, array) === BREAK_INDICATOR) {
         break;
       }
     }
@@ -812,7 +809,7 @@
         iterable = toIterable(collection);
 
     while (++index < length) {
-      if (iteratee(iterable[index], index, iterable) === breakIndicator) {
+      if (iteratee(iterable[index], index, iterable) === BREAK_INDICATOR) {
         break;
       }
     }
@@ -835,7 +832,7 @@
     }
     var iterable = toIterable(collection);
     while (length--) {
-      if (iteratee(iterable[length], length, iterable) === breakIndicator) {
+      if (iteratee(iterable[length], length, iterable) === BREAK_INDICATOR) {
         break;
       }
     }
@@ -857,7 +854,7 @@
 
     baseEach(collection, function(value, index, collection) {
       result = !!predicate(value, index, collection);
-      return result || breakIndicator;
+      return result || BREAK_INDICATOR;
     });
     return result;
   }
@@ -901,7 +898,7 @@
     eachFunc(collection, function(value, key, collection) {
       if (predicate(value, key, collection)) {
         result = retKey ? key : value;
-        return breakIndicator;
+        return BREAK_INDICATOR;
       }
     });
     return result;
@@ -966,7 +963,7 @@
 
     while (++index < length) {
       var key = props[index];
-      if (iteratee(object[key], key, object) === breakIndicator) {
+      if (iteratee(object[key], key, object) === BREAK_INDICATOR) {
         break;
       }
     }
@@ -989,7 +986,7 @@
 
     while (length--) {
       var key = props[length];
-      if (iteratee(object[key], key, object) === breakIndicator) {
+      if (iteratee(object[key], key, object) === BREAK_INDICATOR) {
         break;
       }
     }
@@ -1297,7 +1294,7 @@
 
     baseEach(collection, function(value, index, collection) {
       result = predicate(value, index, collection);
-      return result && breakIndicator;
+      return result && BREAK_INDICATOR;
     });
     return !!result;
   }
@@ -1782,7 +1779,7 @@
     return isObject(value) ? value : Object(value);
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Creates an array with all falsey values removed. The values `false`, `null`,
@@ -2508,7 +2505,7 @@
     return result;
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Creates a `lodash` object that wraps `value` with explicit method
@@ -2613,7 +2610,7 @@
     return this.__wrapped__;
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Checks if `value` is present in `collection` using  `SameValueZero` for
@@ -3651,7 +3648,7 @@
     return filter(collection, matches(source));
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * The opposite of `_.before`; this method creates a function that invokes
@@ -3678,7 +3675,13 @@
    */
   function after(n, func) {
     if (!isFunction(func)) {
-      throw new TypeError(FUNC_ERROR_TEXT);
+      if (isFunction(n)) {
+        var temp = n;
+        n = func;
+        func = temp;
+      } else {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
     }
     n = nativeIsFinite(n = +n) ? n : 0;
     return function() {
@@ -3706,7 +3709,13 @@
   function before(n, func) {
     var result;
     if (!isFunction(func)) {
-      throw new TypeError(FUNC_ERROR_TEXT);
+      if (isFunction(n)) {
+        var temp = n;
+        n = func;
+        func = temp;
+      } else {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
     }
     return function() {
       if (--n > 0) {
@@ -4263,7 +4272,531 @@
     return basePartial(wrapper, PARTIAL_FLAG, [value], []);
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
+   * otherwise they are assigned by reference. If `customizer` is provided it is
+   * invoked to produce the cloned values. If `customizer` returns `undefined`
+   * cloning is handled by the method instead. The `customizer` is bound to
+   * `thisArg` and invoked with two argument; (value, index|key).
+   *
+   * **Note:** This method is loosely based on the structured clone algorithm. Functions
+   * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
+   * objects created by constructors other than `Object` are cloned to plain `Object` objects.
+   * See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+   * for more details.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to clone.
+   * @param {boolean} [isDeep=false] Specify a deep clone.
+   * @param {Function} [customizer] The function to customize cloning values.
+   * @param {*} [thisArg] The `this` binding of `customizer`.
+   * @returns {*} Returns the cloned value.
+   * @example
+   *
+   * var characters = [
+   *   { 'name': 'barney', 'age': 36 },
+   *   { 'name': 'fred',   'age': 40 }
+   * ];
+   *
+   * var shallow = _.clone(characters);
+   * shallow[0] === characters[0];
+   * // => true
+   *
+   * var deep = _.clone(characters, true);
+   * deep[0] === characters[0];
+   * // => false
+   *
+   * _.mixin({
+   *   'clone': _.partialRight(_.clone, function(value) {
+   *     return _.isElement(value) ? value.cloneNode(false) : undefined;
+   *   })
+   * });
+   *
+   * var clone = _.clone(document.body);
+   * clone.childNodes.length;
+   * // => 0
+   */
+  function clone(value) {
+    return isObject(value)
+      ? (isArray(value) ? baseSlice(value) : assign({}, value))
+      : value;
+  }
+
+  /**
+   * Checks if `value` is classified as an `arguments` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+   * @example
+   *
+   * (function() { return _.isArguments(arguments); })();
+   * // => true
+   *
+   * _.isArguments([1, 2, 3]);
+   * // => false
+   */
+  function isArguments(value) {
+    var length = (value && typeof value == 'object') ? value.length : undefined;
+    return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
+      toString.call(value) == argsClass) || false;
+  }
+  // fallback for environments without a `[[Class]]` for `arguments` objects
+  if (!isArguments(arguments)) {
+    isArguments = function(value) {
+      var length = (value && typeof value == 'object') ? value.length : undefined;
+      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
+        hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee')) || false;
+    };
+  }
+
+  /**
+   * Checks if `value` is classified as an `Array` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isArray([1, 2, 3]);
+   * // => true
+   *
+   * (function() { return _.isArray(arguments); })();
+   * // => false
+   */
+  var isArray = nativeIsArray || function(value) {
+    return (value && typeof value == 'object' && typeof value.length == 'number' &&
+      toString.call(value) == arrayClass) || false;
+  };
+
+  /**
+   * Checks if `value` is classified as a boolean primitive or object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isBoolean(false);
+   * // => true
+   *
+   * _.isBoolean(null);
+   * // => false
+   */
+  function isBoolean(value) {
+    return (value === true || value === false ||
+      value && typeof value == 'object' && toString.call(value) == boolClass) || false;
+  }
+
+  /**
+   * Checks if `value` is classified as a `Date` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isDate(new Date);
+   * // => true
+   *
+   * _.isDate('Mon April 23 2012');
+   * // => false
+   */
+  function isDate(value) {
+    return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
+  }
+
+  /**
+   * Checks if `value` is a DOM element.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+   * @example
+   *
+   * _.isElement(document.body);
+   * // => true
+   *
+   * _.isElement('<body>');
+   * // => false
+   */
+  function isElement(value) {
+    return (value && value.nodeType === 1) || false;
+  }
+
+  /**
+   * Checks if a collection is empty. A value is considered empty unless it is
+   * an array-like value with a length greater than `0` or an object with own
+   * enumerable properties.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {Array|Object|string} value The value to inspect.
+   * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+   * @example
+   *
+   * _.isEmpty(null);
+   * // => true
+   *
+   * _.isEmpty(true);
+   * // => true
+   *
+   * _.isEmpty(1);
+   * // => true
+   *
+   * _.isEmpty([1, 2, 3]);
+   * // => false
+   *
+   * _.isEmpty({ 'a': 1 });
+   * // => false
+   */
+  function isEmpty(value) {
+    if (value == null) {
+      return true;
+    }
+    var length = value.length;
+    if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
+        (isArray(value) || isString(value) || isArguments(value))) {
+      return !length;
+    }
+    return !keys(value).length;
+  }
+
+  /**
+   * Performs a deep comparison between two values to determine if they are
+   * equivalent. If `customizer` is provided it is invoked to compare values.
+   * If `customizer` returns `undefined` comparisons are handled by the method
+   * instead. The `customizer` is bound to `thisArg` and invoked with three
+   * arguments; (value, other, key).
+   *
+   * **Note:** This method supports comparing arrays, booleans, `Date` objects,
+   * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
+   * are **not** supported. Provide a customizer function to extend support
+   * for comparing other values.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to compare to `other`.
+   * @param {*} other The value to compare to `value`.
+   * @param {Function} [customizer] The function to customize comparing values.
+   * @param {*} [thisArg] The `this` binding of `customizer`.
+   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+   * @example
+   *
+   * var object = { 'name': 'fred' };
+   * var other = { 'name': 'fred' };
+   *
+   * object == other;
+   * // => false
+   *
+   * _.isEqual(object, other);
+   * // => true
+   *
+   * var words = ['hello', 'goodbye'];
+   * var otherWords = ['hi', 'goodbye'];
+   *
+   * _.isEqual(words, otherWords, function() {
+   *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
+   * });
+   * // => true
+   */
+  function isEqual(value, other) {
+    return baseIsEqual(value, other);
+  }
+
+  /**
+   * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+   * `SyntaxError`, `TypeError`, or `URIError` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+   * @example
+   *
+   * _.isError(new Error);
+   * // => true
+   *
+   * _.isError(Error);
+   * // => false
+   */
+  function isError(value) {
+    return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
+  }
+
+  /**
+   * Checks if `value` is a finite primitive number.
+   *
+   * **Note:** This method is based on ES6 `Number.isFinite`. See the
+   * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
+   * for more details.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+   * @example
+   *
+   * _.isFinite(10);
+   * // => true
+   *
+   * _.isFinite('10');
+   * // => false
+   *
+   * _.isFinite(true);
+   * // => false
+   *
+   * _.isFinite(Object(10));
+   * // => false
+   *
+   * _.isFinite(Infinity);
+   * // => false
+   */
+  function isFinite(value) {
+    value = parseFloat(nativeIsFinite(value) && value);
+    return value == value;
+  }
+
+  /**
+   * Checks if `value` is classified as a `Function` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isFunction(_);
+   * // => true
+   *
+   * _.isFunction(/abc/);
+   * // => false
+   */
+  function isFunction(value) {
+    // avoid a Chakra bug in IE 11
+    // https://github.com/jashkenas/underscore/issues/1621
+    return typeof value == 'function' || false;
+  }
+  // fallback for older versions of Chrome and Safari
+  if (isFunction(/x/)) {
+    isFunction = function(value) {
+      return typeof value == 'function' && toString.call(value) == funcClass;
+    };
+  }
+
+  /**
+   * Checks if `value` is the language type of `Object`.
+   * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+   *
+   * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+   * @example
+   *
+   * _.isObject({});
+   * // => true
+   *
+   * _.isObject([1, 2, 3]);
+   * // => true
+   *
+   * _.isObject(1);
+   * // => false
+   */
+  function isObject(value) {
+    // avoid a V8 bug in Chrome 19-20
+    // https://code.google.com/p/v8/issues/detail?id=2291
+    var type = typeof value;
+    return type == 'function' || (value && type == 'object') || false;
+  }
+
+  /**
+   * Checks if `value` is `NaN`.
+   *
+   * **Note:** This method is not the same as native `isNaN` which returns `true`
+   * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
+   * for more details.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+   * @example
+   *
+   * _.isNaN(NaN);
+   * // => true
+   *
+   * _.isNaN(new Number(NaN));
+   * // => true
+   *
+   * isNaN(undefined);
+   * // => true
+   *
+   * _.isNaN(undefined);
+   * // => false
+   */
+  function isNaN(value) {
+    // `NaN` as a primitive is the only value that is not equal to itself
+    // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
+    return isNumber(value) && value != +value;
+  }
+
+  /**
+   * Checks if `value` is a native function.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
+   * @example
+   *
+   * _.isNative(Array.prototype.push);
+   * // => true
+   *
+   * _.isNative(_);
+   * // => false
+   */
+  function isNative(value) {
+    if (isFunction(value)) {
+      return reNative.test(fnToString.call(value));
+    }
+    return (value && typeof value == 'object' && reHostCtor.test(value)) || false;
+  }
+
+  /**
+   * Checks if `value` is `null`.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+   * @example
+   *
+   * _.isNull(null);
+   * // => true
+   *
+   * _.isNull(void 0);
+   * // => false
+   */
+  function isNull(value) {
+    return value === null;
+  }
+
+  /**
+   * Checks if `value` is classified as a `Number` primitive or object.
+   *
+   * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
+   * as numbers, use the `_.isFinite` method.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isNumber(8.4);
+   * // => true
+   *
+   * _.isNumber(NaN);
+   * // => true
+   *
+   * _.isNumber('8.4');
+   * // => false
+   */
+  function isNumber(value) {
+    var type = typeof value;
+    return type == 'number' ||
+      (value && type == 'object' && toString.call(value) == numberClass) || false;
+  }
+
+  /**
+   * Checks if `value` is classified as a `RegExp` object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isRegExp(/abc/);
+   * // => true
+   *
+   * _.isRegExp('/abc/');
+   * // => false
+   */
+  function isRegExp(value) {
+    return (isObject(value) && toString.call(value) == regexpClass) || false;
+  }
+
+  /**
+   * Checks if `value` is classified as a `String` primitive or object.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   * @example
+   *
+   * _.isString('abc');
+   * // => true
+   *
+   * _.isString(1);
+   * // => false
+   */
+  function isString(value) {
+    return typeof value == 'string' ||
+      (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
+  }
+
+  /**
+   * Checks if `value` is `undefined`.
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+   * @example
+   *
+   * _.isUndefined(void 0);
+   * // => true
+   *
+   * _.isUndefined(null);
+   * // => false
+   */
+  function isUndefined(value) {
+    return typeof value == 'undefined';
+  }
+
+  /*------------------------------------------------------------------------*/
 
   /**
    * Assigns own enumerable properties of source object(s) to the destination
@@ -4311,58 +4844,6 @@
     return object;
   }
 
-  /**
-   * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
-   * otherwise they are assigned by reference. If `customizer` is provided it is
-   * invoked to produce the cloned values. If `customizer` returns `undefined`
-   * cloning is handled by the method instead. The `customizer` is bound to
-   * `thisArg` and invoked with two argument; (value, index|key).
-   *
-   * **Note:** This method is loosely based on the structured clone algorithm. Functions
-   * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
-   * objects created by constructors other than `Object` are cloned to plain `Object` objects.
-   * See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
-   * for more details.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to clone.
-   * @param {boolean} [isDeep=false] Specify a deep clone.
-   * @param {Function} [customizer] The function to customize cloning values.
-   * @param {*} [thisArg] The `this` binding of `customizer`.
-   * @returns {*} Returns the cloned value.
-   * @example
-   *
-   * var characters = [
-   *   { 'name': 'barney', 'age': 36 },
-   *   { 'name': 'fred',   'age': 40 }
-   * ];
-   *
-   * var shallow = _.clone(characters);
-   * shallow[0] === characters[0];
-   * // => true
-   *
-   * var deep = _.clone(characters, true);
-   * deep[0] === characters[0];
-   * // => false
-   *
-   * _.mixin({
-   *   'clone': _.partialRight(_.clone, function(value) {
-   *     return _.isElement(value) ? value.cloneNode(false) : undefined;
-   *   })
-   * });
-   *
-   * var clone = _.clone(document.body);
-   * clone.childNodes.length;
-   * // => 0
-   */
-  function clone(value) {
-    return isObject(value)
-      ? (isArray(value) ? baseSlice(value) : assign({}, value))
-      : value;
-  }
-
   /**
    * Assigns own enumerable properties of source object(s) to the destination
    * object for all destination properties that resolve to `undefined`. Once a
@@ -4481,469 +4962,6 @@
     return result;
   }
 
-  /**
-   * Checks if `value` is classified as an `arguments` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
-   * @example
-   *
-   * (function() { return _.isArguments(arguments); })();
-   * // => true
-   *
-   * _.isArguments([1, 2, 3]);
-   * // => false
-   */
-  function isArguments(value) {
-    var length = (value && typeof value == 'object') ? value.length : undefined;
-    return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
-      toString.call(value) == argsClass) || false;
-  }
-  // fallback for environments without a `[[Class]]` for `arguments` objects
-  if (!isArguments(arguments)) {
-    isArguments = function(value) {
-      var length = (value && typeof value == 'object') ? value.length : undefined;
-      return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
-        hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee')) || false;
-    };
-  }
-
-  /**
-   * Checks if `value` is classified as an `Array` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isArray([1, 2, 3]);
-   * // => true
-   *
-   * (function() { return _.isArray(arguments); })();
-   * // => false
-   */
-  var isArray = nativeIsArray || function(value) {
-    return (value && typeof value == 'object' && typeof value.length == 'number' &&
-      toString.call(value) == arrayClass) || false;
-  };
-
-  /**
-   * Checks if `value` is classified as a boolean primitive or object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isBoolean(false);
-   * // => true
-   *
-   * _.isBoolean(null);
-   * // => false
-   */
-  function isBoolean(value) {
-    return (value === true || value === false ||
-      value && typeof value == 'object' && toString.call(value) == boolClass) || false;
-  }
-
-  /**
-   * Checks if `value` is classified as a `Date` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isDate(new Date);
-   * // => true
-   *
-   * _.isDate('Mon April 23 2012');
-   * // => false
-   */
-  function isDate(value) {
-    return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
-  }
-
-  /**
-   * Checks if `value` is a DOM element.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
-   * @example
-   *
-   * _.isElement(document.body);
-   * // => true
-   *
-   * _.isElement('<body>');
-   * // => false
-   */
-  function isElement(value) {
-    return (value && value.nodeType === 1) || false;
-  }
-
-  /**
-   * Checks if a collection is empty. A value is considered empty unless it is
-   * an array-like value with a length greater than `0` or an object with own
-   * enumerable properties.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {Array|Object|string} value The value to inspect.
-   * @returns {boolean} Returns `true` if `value` is empty, else `false`.
-   * @example
-   *
-   * _.isEmpty(null);
-   * // => true
-   *
-   * _.isEmpty(true);
-   * // => true
-   *
-   * _.isEmpty(1);
-   * // => true
-   *
-   * _.isEmpty([1, 2, 3]);
-   * // => false
-   *
-   * _.isEmpty({ 'a': 1 });
-   * // => false
-   */
-  function isEmpty(value) {
-    if (value == null) {
-      return true;
-    }
-    var length = value.length;
-    if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
-        (isArray(value) || isString(value) || isArguments(value))) {
-      return !length;
-    }
-    return !keys(value).length;
-  }
-
-  /**
-   * Performs a deep comparison between two values to determine if they are
-   * equivalent. If `customizer` is provided it is invoked to compare values.
-   * If `customizer` returns `undefined` comparisons are handled by the method
-   * instead. The `customizer` is bound to `thisArg` and invoked with three
-   * arguments; (value, other, key).
-   *
-   * **Note:** This method supports comparing arrays, booleans, `Date` objects,
-   * numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
-   * are **not** supported. Provide a customizer function to extend support
-   * for comparing other values.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to compare to `other`.
-   * @param {*} other The value to compare to `value`.
-   * @param {Function} [customizer] The function to customize comparing values.
-   * @param {*} [thisArg] The `this` binding of `customizer`.
-   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
-   * @example
-   *
-   * var object = { 'name': 'fred' };
-   * var other = { 'name': 'fred' };
-   *
-   * object == other;
-   * // => false
-   *
-   * _.isEqual(object, other);
-   * // => true
-   *
-   * var words = ['hello', 'goodbye'];
-   * var otherWords = ['hi', 'goodbye'];
-   *
-   * _.isEqual(words, otherWords, function() {
-   *   return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
-   * });
-   * // => true
-   */
-  function isEqual(value, other) {
-    return baseIsEqual(value, other);
-  }
-
-  /**
-   * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
-   * `SyntaxError`, `TypeError`, or `URIError` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
-   * @example
-   *
-   * _.isError(new Error);
-   * // => true
-   *
-   * _.isError(Error);
-   * // => false
-   */
-  function isError(value) {
-    return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
-  }
-
-  /**
-   * Checks if `value` is a finite primitive number.
-   *
-   * **Note:** This method is based on ES6 `Number.isFinite`. See the
-   * [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
-   * for more details.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
-   * @example
-   *
-   * _.isFinite(10);
-   * // => true
-   *
-   * _.isFinite('10');
-   * // => false
-   *
-   * _.isFinite(true);
-   * // => false
-   *
-   * _.isFinite(Object(10));
-   * // => false
-   *
-   * _.isFinite(Infinity);
-   * // => false
-   */
-  function isFinite(value) {
-    value = parseFloat(nativeIsFinite(value) && value);
-    return value == value;
-  }
-
-  /**
-   * Checks if `value` is classified as a `Function` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isFunction(_);
-   * // => true
-   *
-   * _.isFunction(/abc/);
-   * // => false
-   */
-  function isFunction(value) {
-    // avoid a Chakra bug in IE 11
-    // https://github.com/jashkenas/underscore/issues/1621
-    return typeof value == 'function' || false;
-  }
-  // fallback for older versions of Chrome and Safari
-  if (isFunction(/x/)) {
-    isFunction = function(value) {
-      return typeof value == 'function' && toString.call(value) == funcClass;
-    };
-  }
-
-  /**
-   * Checks if `value` is the language type of `Object`.
-   * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-   *
-   * **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-   * @example
-   *
-   * _.isObject({});
-   * // => true
-   *
-   * _.isObject([1, 2, 3]);
-   * // => true
-   *
-   * _.isObject(1);
-   * // => false
-   */
-  function isObject(value) {
-    // avoid a V8 bug in Chrome 19-20
-    // https://code.google.com/p/v8/issues/detail?id=2291
-    var type = typeof value;
-    return type == 'function' || (value && type == 'object') || false;
-  }
-
-  /**
-   * Checks if `value` is `NaN`.
-   *
-   * **Note:** This method is not the same as native `isNaN` which returns `true`
-   * for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
-   * for more details.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
-   * @example
-   *
-   * _.isNaN(NaN);
-   * // => true
-   *
-   * _.isNaN(new Number(NaN));
-   * // => true
-   *
-   * isNaN(undefined);
-   * // => true
-   *
-   * _.isNaN(undefined);
-   * // => false
-   */
-  function isNaN(value) {
-    // `NaN` as a primitive is the only value that is not equal to itself
-    // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
-    return isNumber(value) && value != +value;
-  }
-
-  /**
-   * Checks if `value` is a native function.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
-   */
-  function isNative(value) {
-    if (isFunction(value)) {
-      return reNative.test(fnToString.call(value));
-    }
-    return (value && typeof value == 'object' && reHostCtor.test(value)) || false;
-  }
-
-  /**
-   * Checks if `value` is `null`.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
-   * @example
-   *
-   * _.isNull(null);
-   * // => true
-   *
-   * _.isNull(void 0);
-   * // => false
-   */
-  function isNull(value) {
-    return value === null;
-  }
-
-  /**
-   * Checks if `value` is classified as a `Number` primitive or object.
-   *
-   * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
-   * as numbers, use the `_.isFinite` method.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isNumber(8.4);
-   * // => true
-   *
-   * _.isNumber(NaN);
-   * // => true
-   *
-   * _.isNumber('8.4');
-   * // => false
-   */
-  function isNumber(value) {
-    var type = typeof value;
-    return type == 'number' ||
-      (value && type == 'object' && toString.call(value) == numberClass) || false;
-  }
-
-  /**
-   * Checks if `value` is classified as a `RegExp` object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isRegExp(/abc/);
-   * // => true
-   *
-   * _.isRegExp('/abc/');
-   * // => false
-   */
-  function isRegExp(value) {
-    return (isObject(value) && toString.call(value) == regexpClass) || false;
-  }
-
-  /**
-   * Checks if `value` is classified as a `String` primitive or object.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
-   * @example
-   *
-   * _.isString('abc');
-   * // => true
-   *
-   * _.isString(1);
-   * // => false
-   */
-  function isString(value) {
-    return typeof value == 'string' ||
-      (value && typeof value == 'object' && toString.call(value) == stringClass) || false;
-  }
-
-  /**
-   * Checks if `value` is `undefined`.
-   *
-   * @static
-   * @memberOf _
-   * @category Object
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
-   * @example
-   *
-   * _.isUndefined(void 0);
-   * // => true
-   *
-   * _.isUndefined(null);
-   * // => false
-   */
-  function isUndefined(value) {
-    return typeof value == 'undefined';
-  }
-
   /**
    * Creates an array of the own enumerable property names of `object`.
    *
@@ -5129,7 +5147,7 @@
     return baseValues(object, keys);
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Converts the characters "&", "<", ">", '"', "'", and '`', in `string` to
@@ -5355,7 +5373,7 @@
       : string;
   }
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   /**
    * Attempts to invoke `func`, returning either the result or the caught
@@ -5849,13 +5867,7 @@
     return prefix ? prefix + id : id;
   }
 
-  /*--------------------------------------------------------------------------*/
-
-  // ensure `new lodashWrapper` is an instance of `lodash`
-  lodashWrapper.prototype = lodash.prototype;
-
-  // assign default placeholders
-  bind.placeholder = partial.placeholder = lodash;
+  /*------------------------------------------------------------------------*/
 
   // add functions that return wrapped values when chaining
   lodash.after = after;
@@ -5926,7 +5938,7 @@
   lodash.tail = rest;
   lodash.unique = uniq;
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   // add functions that return unwrapped values when chaining
   lodash.clone = clone;
@@ -5983,12 +5995,12 @@
   lodash.include = contains;
   lodash.inject = reduce;
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   // add functions capable of returning wrapped and unwrapped values when chaining
   lodash.sample = sample;
 
-  /*--------------------------------------------------------------------------*/
+  /*------------------------------------------------------------------------*/
 
   // add functions to `lodash.prototype`
   mixin(assign({}, lodash));
@@ -6002,10 +6014,16 @@
    */
   lodash.VERSION = VERSION;
 
+  // ensure `new lodashWrapper` is an instance of `lodash`
+  lodashWrapper.prototype = lodash.prototype;
+
   // add "Chaining" functions to the wrapper
   lodash.prototype.chain = wrapperChain;
   lodash.prototype.value = wrapperValueOf;
 
+  // assign default placeholders
+  partial.placeholder = lodash;
+
   // add `Array` mutator functions to the wrapper
   arrayEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
     var func = arrayProto[methodName];
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 4664e881d..89ddbc85a 100644
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+++ b/dist/lodash.underscore.min.js
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