diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index 2b6c51a1a..9cc32cc8e 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -4,7 +4,7 @@
  * 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>
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <http://lodash.com/license>
  */
 ;(function() {
@@ -50,7 +50,7 @@
    */
   var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
 
-  /** Used to match regexp flags from their coerced string values */
+  /** Used to match `RegExp` flags from their coerced string values */
   var reFlags = /\w*$/;
 
   /** Used to detected named functions */
@@ -66,8 +66,8 @@
   var reNoMatch = /($^)/;
 
   /**
-   * Used to match RegExp special characters.
-   * See this [article on RegExp characters](http://www.regular-expressions.info/characters.html#special)
+   * Used to match `RegExp` special characters.
+   * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
   var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
@@ -100,13 +100,13 @@
     'parseInt', 'setTimeout', 'TypeError', 'window', 'WinRTError'
   ];
 
-  /** Used to fix the JScript [[DontEnum]] bug */
+  /** Used to fix the JScript `[[DontEnum]]` bug */
   var shadowedProps = [
     'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
     'toLocaleString', 'toString', 'valueOf'
   ];
 
-  /** Used to make template sourceURLs easier to identify */
+  /** Used to make template `sourceURL`s easier to identify */
   var templateCounter = 0;
 
   /** `Object#toString` result shortcuts */
@@ -195,7 +195,7 @@
     '\xDF': 'ss', '\xD7': ' ', '\xF7': ' '
   };
 
-  /** Used to determine if values are of the language type Object */
+  /** Used to determine if values are of the language type `Object` */
   var objectTypes = {
     'function': true,
     'object': true
@@ -316,6 +316,7 @@
    *
    * @private
    * @param {string} string The string to inspect.
+   * @param {string} chars The chars to find.
    * @returns {number} Returns the index of the first character not found in `chars`.
    */
   function charsLeftIndex(string, chars) {
@@ -335,6 +336,7 @@
    *
    * @private
    * @param {string} string The string to inspect.
+   * @param {string} chars The chars to find.
    * @returns {number} Returns the index of the last character not found in `chars`.
    */
   function charsRightIndex(string, chars) {
@@ -348,7 +350,7 @@
   }
 
   /**
-   * Used by `sortBy` to compare transformed elements of a collection and stable
+   * Used by `_.sortBy` to compare transformed elements of a collection and stable
    * sort them in ascending order.
    *
    * @private
@@ -361,7 +363,7 @@
   }
 
   /**
-   * Used by `sortBy` to compare multiple properties of each element in a
+   * Used by `_.sortBy` to compare multiple properties of each element in a
    * collection and stable sort them in ascending order.
    *
    * @private
@@ -425,7 +427,7 @@
   }
 
   /**
-   * Used by `escape` to convert characters to HTML entities.
+   * Used by `_.escape` to convert characters to HTML entities.
    *
    * @private
    * @param {string} chr The matched character to escape.
@@ -436,7 +438,7 @@
   }
 
   /**
-   * Used by `template` to escape characters for inclusion in compiled
+   * Used by `_.template` to escape characters for inclusion in compiled
    * string literals.
    *
    * @private
@@ -461,7 +463,7 @@
   }
 
   /**
-   * A fallback implementation of `trim` to remove leading and trailing
+   * A fallback implementation of `String#trim` to remove leading and trailing
    * whitespace or specified characters from `string`.
    *
    * @private
@@ -482,7 +484,7 @@
   }
 
   /**
-   * A fallback implementation of `trimLeft` to remove leading whitespace or
+   * A fallback implementation of `String#trimLeft` to remove leading whitespace or
    * specified characters from `string`.
    *
    * @private
@@ -503,7 +505,7 @@
   }
 
   /**
-   * A fallback implementation of `trimRight` to remove trailing whitespace or
+   * A fallback implementation of `String#trimRight` to remove trailing whitespace or
    * specified characters from `string`.
    *
    * @private
@@ -564,7 +566,7 @@
   }
 
   /**
-   * Used by `unescape` to convert HTML entities to characters.
+   * Used by `_.unescape` to convert HTML entities to characters.
    *
    * @private
    * @param {string} chr The matched character to unescape.
@@ -577,7 +579,7 @@
   /*--------------------------------------------------------------------------*/
 
   /**
-   * Create a new `lodash` function using the given context object.
+   * Create a new `lodash` function using the given `context` object.
    *
    * @static
    * @memberOf _
@@ -614,17 +616,17 @@
     /** Used to detect DOM support */
     var document = (document = context.window) && document.document;
 
-    /** Used to restore the original `_` reference in `noConflict` */
+    /** Used to restore the original `_` reference in `_.noConflict` */
     var oldDash = context._;
 
     /**
-     * Used as the maximum length an array-like object.
+     * Used as the maximum length of an array-like object.
      * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
      * for more details.
      */
     var maxSafeInteger = Math.pow(2, 53) - 1;
 
-    /** Used to resolve the internal [[Class]] of values */
+    /** Used to resolve the internal `[[Class]]` of values */
     var toString = objectProto.toString;
 
     /** Used to detect if a method is native */
@@ -647,7 +649,7 @@
         splice = arrayRef.splice,
         unshift = arrayRef.unshift;
 
-    /** Used to set meta data on functions */
+    /** Used to set metadata on functions */
     var defineProperty = (function() {
       // IE 8 only accepts DOM elements
       try {
@@ -674,7 +676,7 @@
         nativeTrimLeft = isNative(nativeTrimLeft = stringProto.trimLeft) && !nativeTrimLeft.call(whitespace) && nativeTrimLeft,
         nativeTrimRight = isNative(nativeTrimRight = stringProto.trimRight) && !nativeTrimRight.call(whitespace) && nativeTrimRight;
 
-    /** Used to lookup a built-in constructor by [[Class]] */
+    /** Used to lookup a built-in constructor by `[[Class]]` */
     var ctorByClass = {};
     ctorByClass[arrayClass] = Array;
     ctorByClass[boolClass] = Boolean;
@@ -785,7 +787,7 @@
      *
      * @private
      * @param {*} value The value to wrap in a `lodash` instance.
-     * @param {boolean} [chainAll=false] A flag to enable chaining for all methods
+     * @param {boolean} [chainAll=false] A flag to enable chaining for all methods.
      * @returns {Object} Returns a `lodash` instance.
      */
     function lodashWrapper(value, chainAll) {
@@ -814,7 +816,7 @@
       for (key in arguments) { }
 
       /**
-       * Detect if an `arguments` object's [[Class]] is resolvable (all but Firefox < 4, IE < 9).
+       * Detect if an `arguments` object's `[[Class]]` is resolvable (all but Firefox < 4, IE < 9).
        *
        * @memberOf _.support
        * @type boolean
@@ -843,8 +845,8 @@
        *
        * Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
        * (if the prototype or a property on the prototype has been set)
-       * incorrectly sets a function's `prototype` property [[Enumerable]]
-       * value to `true`.
+       * incorrectly sets the `[[Enumerable]]` value of a function's `prototype`
+       * property to `true`.
        *
        * @memberOf _.support
        * @type boolean
@@ -881,7 +883,7 @@
        * Detect if properties shadowing those on `Object.prototype` are non-enumerable.
        *
        * In IE < 9 an objects own properties, shadowing non-enumerable ones, are
-       * made non-enumerable as well (a.k.a the JScript [[DontEnum]] bug).
+       * made non-enumerable as well (a.k.a the JScript `[[DontEnum]]` bug).
        *
        * @memberOf _.support
        * @type boolean
@@ -934,7 +936,7 @@
       }
 
       /**
-       * Detect if a DOM node's [[Class]] is resolvable (all but IE < 9)
+       * Detect if a DOM node's `[[Class]]` is resolvable (all but IE < 9)
        * and that the JS engine errors when attempting to coerce an object to
        * a string without a `toString` function.
        *
@@ -1013,7 +1015,7 @@
 
     /**
      * The base implementation of `_.bind` that creates the bound function and
-     * sets its meta data.
+     * sets its metadata.
      *
      * @private
      * @param {Array} data The metadata array.
@@ -1074,7 +1076,7 @@
           return result;
         }
       }
-      // inspect [[Class]]
+      // inspect `[[Class]]`
       var isObj = isObject(value);
       if (isObj) {
         var className = toString.call(value);
@@ -1228,7 +1230,7 @@
 
     /**
      * The base implementation of `createWrapper` that creates the wrapper and
-     * sets its meta data.
+     * sets its metadata.
      *
      * @private
      * @param {Array} data The metadata array.
@@ -1392,7 +1394,7 @@
     }
 
     /**
-     * The base implementation of `find`, 'findLast`, `findKey`, and `findLastKey`
+     * The base implementation of `_.find`, '_.findLast`, `_.findKey`, and `_.findLastKey`
      * without support for callback shorthands or `this` binding which iterates
      * over `collection` using the provided `eachFunc`.
      *
@@ -1578,7 +1580,7 @@
           (valType != 'function' && valType != 'object' && othType != 'function' && othType != 'object'))) {
         return false;
       }
-      // compare [[Class]] names
+      // compare `[[Class]]` names
       var valClass = toString.call(value),
           othClass = toString.call(other),
           valIsArg = valClass == argsClass,
@@ -2163,7 +2165,7 @@
     };
 
     /**
-     * A fallback implementation of `isPlainObject` which checks if `value` is
+     * A fallback implementation of `_.isPlainObject` which checks if `value` is
      * an object created by the `Object` constructor, assuming objects created
      * by the `Object` constructor have no inherited enumerable properties and
      * that there are no `Object.prototype` extensions.
@@ -2215,11 +2217,17 @@
       var index = -1,
           props = keysIn(object),
           length = props.length,
+          objLength = length && object.length,
           result = [];
 
+      if (typeof objLength == 'number' && objLength > 0) {
+        var allowIndexes = isArray(object) || (support.unindexedChars && isString(object)),
+            maxIndex = objLength - 1;
+      }
       while (++index < length) {
         var key = props[index];
-        if (hasOwnProperty.call(object, key)) {
+        if ((allowIndexes && key > -1 && key <= maxIndex && key % 1 == 0) ||
+            hasOwnProperty.call(object, key)) {
           result.push(key);
         }
       }
@@ -2272,8 +2280,8 @@
      * _.difference([1, 2, 3], [5, 2, 10]);
      * // => [1, 3]
      */
-    function difference(array) {
-      return baseDifference(array, baseFlatten(arguments, true, true, 1));
+    function difference() {
+      return baseDifference(arguments[0], baseFlatten(arguments, true, true, 1));
     }
 
     /**
@@ -2710,46 +2718,43 @@
      * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
      * // => [1, 2]
      */
-    function intersection(array) {
-      if (!array) {
-        return [];
-      }
+    function intersection() {
       var args = [],
           argsIndex = -1,
           argsLength = arguments.length,
           caches = [],
           indexOf = getIndexOf(),
-          prereq = createCache && indexOf === baseIndexOf,
-          seen = [];
+          prereq = createCache && indexOf === baseIndexOf;
 
       while (++argsIndex < argsLength) {
         var value = arguments[argsIndex];
         if (isArray(value) || isArguments(value)) {
           args.push(value);
           caches.push(prereq && value.length >= 120 &&
-            createCache(argsIndex ? value : seen));
+            createCache(argsIndex && value));
         }
       }
       argsLength = args.length;
       var array = args[0],
           index = -1,
           length = array ? array.length : 0,
-          result = [];
+          result = [],
+          seen = caches[0];
 
       outer:
       while (++index < length) {
-        var cache = caches[0];
         value = array[index];
-
-        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
+        if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value)) < 0) {
           argsIndex = argsLength;
-          (cache || seen).push(value);
           while (--argsIndex) {
-            cache = caches[argsIndex];
+            var cache = caches[argsIndex];
             if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
               continue outer;
             }
           }
+          if (seen) {
+            seen.push(value);
+          }
           result.push(value);
         }
       }
@@ -3427,9 +3432,7 @@
      * // => 'pebbles is 1'
      */
     function chain(value) {
-      value = new lodashWrapper(value);
-      value.__chain__ = true;
-      return value;
+      return new lodashWrapper(value, true);
     }
 
     /**
@@ -4906,7 +4909,7 @@
      * @static
      * @memberOf _
      * @category Functions
-     * @param {...Function} [func] Functions to compose.
+     * @param {...Function} [funcs] Functions to compose.
      * @returns {Function} Returns the new composed function.
      * @example
      *
@@ -4992,7 +4995,7 @@
      * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
      * to the debounced function will return the result of the last `func` call.
      *
-     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * Note: If `leading` and `trailing` options are `true`, `func` will be called
      * on the trailing edge of the timeout only if the the debounced function is
      * invoked more than once during the `wait` timeout.
      *
@@ -5368,7 +5371,7 @@
      * of the `wait` timeout. Subsequent calls to the throttled function will
      * return the result of the last `func` call.
      *
-     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * Note: If `leading` and `trailing` options are `true`, `func` will be called
      * on the trailing edge of the timeout only if the the throttled function is
      * invoked more than once during the `wait` timeout.
      *
@@ -5989,7 +5992,7 @@
       return value && typeof value == 'object' && typeof value.length == 'number' &&
         toString.call(value) == argsClass || false;
     }
-    // fallback for environments that can't detect `arguments` objects by [[Class]]
+    // fallback for environments that can't detect `arguments` objects by `[[Class]]`
     if (!support.argsClass) {
       isArguments = function(value) {
         return value && typeof value == 'object' && typeof value.length == 'number' &&
@@ -6250,7 +6253,7 @@
     }
 
     /**
-     * Checks if `value` is the language type of Object.
+     * Checks if `value` is the language type of `Object`.
      * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
      *
      * @static
@@ -6270,7 +6273,7 @@
      * // => false
      */
     function isObject(value) {
-      // check if the value is the ECMAScript language type of Object
+      // check if the value is the ECMAScript language type of `Object`
       // http://es5.github.io/#x8
       // and avoid a V8 bug
       // https://code.google.com/p/v8/issues/detail?id=2291
@@ -6306,7 +6309,7 @@
      */
     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)
+      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
       return isNumber(value) && value != +value;
     }
 
@@ -6478,8 +6481,8 @@
      * // => ['x', 'y'] (property order is not guaranteed across environments)
      */
     var keys = !nativeKeys ? shimKeys : function(object) {
-      if ((support.enumPrototypes && typeof object == 'function') ||
-          (support.nonEnumArgs && object && object.length && isArguments(object))) {
+      var length = object ? object.length : 0;
+      if (typeof length == 'number' && length > 0) {
         return shimKeys(object);
       }
       return isObject(object) ? nativeKeys(object) : [];
@@ -6506,19 +6509,30 @@
      * // => ['x', 'y', 'z'] (property order is not guaranteed across environments)
      */
     function keysIn(object) {
-      var result = [];
       if (!isObject(object)) {
-        return result;
+        return [];
       }
-      if (support.nonEnumArgs && object.length && isArguments(object)) {
-        object = slice(object);
-      }
-      var skipProto = support.enumPrototypes && typeof object == 'function',
-          skipErrorProps = support.enumErrorProps && (object === errorProto || object instanceof Error);
+      var length = object.length;
+      length = (typeof length == 'number' && length > 0 &&
+        (isArray(object) || (support.unindexedChars && isString(object)) ||
+          (support.nonEnumArgs && isArguments(object))) && length) >>> 0;
 
+      var maxIndex = length - 1,
+          result = Array(length),
+          skipIndexes = length > 0,
+          skipErrorProps = support.enumErrorProps && (object === errorProto || object instanceof Error),
+          skipProto = support.enumPrototypes && typeof object == 'function';
+
+      if (skipIndexes) {
+        var index = -1;
+        while (++index < length) {
+          result[index] = String(index);
+        }
+      }
       for (var key in object) {
         if (!(skipProto && key == 'prototype') &&
-            !(skipErrorProps && (key == 'message' || key == 'name'))) {
+            !(skipErrorProps && (key == 'message' || key == 'name')) &&
+            !(skipIndexes && key > -1 && key <= maxIndex && key % 1 == 0)) {
           result.push(key);
         }
       }
@@ -6527,9 +6541,9 @@
       // attribute of an existing property and the `constructor` property of a
       // prototype defaults to non-enumerable.
       if (support.nonEnumShadows && object !== objectProto) {
-        var ctor = object.constructor,
-            index = -1,
-            length = shadowedProps.length;
+        var ctor = object.constructor;
+        index = -1;
+        length = shadowedProps.length;
 
         if (object === (ctor && ctor.prototype)) {
           var className = object === stringProto ? stringClass : object === errorProto ? errorClass : toString.call(object),
@@ -6996,7 +7010,7 @@
     }
 
     /**
-     * Escapes the RegExp special characters "\", "^", "$", ".", "|", "?", "*",
+     * Escapes the `RegExp` special characters "\", "^", "$", ".", "|", "?", "*",
      * "+", "(", ")", "[", "]", "{" and "}" in `string`.
      *
      * @static
@@ -7232,7 +7246,7 @@
      * settings object is provided it will override `_.templateSettings` for the
      * template.
      *
-     * Note: In the development build, `_.template` utilizes sourceURLs for easier debugging.
+     * Note: In the development build, `_.template` utilizes `sourceURL`s for easier debugging.
      * See the [HTML5 Rocks article on sourcemaps](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
      * for more details.
      *
@@ -7252,7 +7266,7 @@
      * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
      * @param {Object} [options.imports] An object to import into the template as local variables.
      * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
-     * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
+     * @param {string} [options.sourceURL] The `sourceURL` of the template's compiled source.
      * @param {string} [options.variable] The data object variable name.
      * @returns {Function|string} Returns the interpolated string if a data object
      *  is provided, else the compiled template function.
@@ -7290,7 +7304,7 @@
      * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
      * // => '<li>fred</li><li>barney</li>'
      *
-     * // using the `sourceURL` option to specify a custom sourceURL for the template
+     * // using the `sourceURL` option to specify a custom `sourceURL` for the template
      * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
      * compiled(data);
      * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
@@ -7396,7 +7410,7 @@
         source +
         'return __p\n}';
 
-      // Use a sourceURL for easier debugging.
+      // Use a `sourceURL` for easier debugging.
       // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
       var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';
 
@@ -7496,7 +7510,7 @@
      * @static
      * @memberOf _
      * @category Strings
-     * @param {string} [string=''] The string to trim.
+     * @param {string} [string=''] The string to truncate.
      * @param {Object|number} [options] The options object or maximum string length.
      * @param {number} [options.length=30] The maximum string length.
      * @param {string} [options.omission='...'] The string used to indicate text is omitted.
@@ -7866,7 +7880,7 @@
 
     /**
      * Converts `value` to an integer of the specified radix. If `radix` is
-     * `undefined` or `0` a `radix` of `10` is used unless `value` is a hexadecimal,
+     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal,
      * in which case a `radix` of `16` is used.
      *
      * Note: This method avoids differences in native ES3 and ES5 `parseInt`
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index a42fda14b..7eaa54f1e 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -6,63 +6,64 @@
 ;(function(){function n(n,t){return typeof n=="undefined"?t:n}function t(n,t){if(n!==t){if(n>t||typeof n=="undefined")return 1;if(n<t||typeof t=="undefined")return-1}return 0}function r(n,t,r){r=(+r||0)-1;for(var e=n?n.length:0;++r<e;)if(n[r]===t)return r;return-1}function e(n,t){return n.has(t)?0:-1}function u(n){return n.charCodeAt(0)}function o(n,t){for(var r=-1,e=n.length;++r<e&&0<=t.indexOf(n.charAt(r)););return r}function a(n,t){for(var r=n.length;r--&&0<=t.indexOf(n.charAt(r)););return r}function i(n,r){return t(n.a,r.a)||n.b-r.b
 }function l(n,r){for(var e=-1,u=n.a,o=r.a,a=u.length;++e<a;){var i=t(u[e],o[e]);if(i)return i}return n.b-r.b}function f(n){return function(t){for(var r=-1,e=(t=null!=t&&(t+"").replace(U,c).match(X))?t.length:0,u="";++r<e;)u=n(u,t[r],r,t);return u}}function c(n){return ht[n]}function s(n){return st[n]}function p(n){return"\\"+vt[n]}function h(n){return typeof n.toString!="function"&&typeof(n+"")=="string"}function g(n,t){return(n=null==n?"":n+"")?null==t?n.slice(m(n),d(n)+1):(t+="",n.slice(o(n,t),a(n,t)+1)):n
 }function v(n,t){return(n=null==n?"":n+"")?null==t?n.slice(m(n)):(t+="",n.slice(o(n,t))):n}function y(n,t){return(n=null==n?"":n+"")?null==t?n.slice(0,d(n)+1):(t+="",n.slice(0,a(n,t)+1)):n}function m(n){for(var t=-1,r=n.length;++t<r;){var e=n.charCodeAt(t);if((160<e||9>e||13<e)&&32!=e&&160!=e&&5760!=e&&6158!=e&&(8192>e||8202<e&&8232!=e&&8233!=e&&8239!=e&&8287!=e&&12288!=e&&65279!=e))break}return t}function d(n){for(var t=n.length;t--;){var r=n.charCodeAt(t);if((160<r||9>r||13<r)&&32!=r&&160!=r&&5760!=r&&6158!=r&&(8192>r||8202<r&&8232!=r&&8233!=r&&8239!=r&&8287!=r&&12288!=r&&65279!=r))break
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+if(!n)return t;var r=Zr.call(n),e=n.length;return-1<e&&e<=Vr&&(r==Q||r==it||(je.argsClass?r==J:sr(n))||r==ot&&hr(n.splice))?!e:(_t(n,function(){return t=false}),t)},o.isEqual=function(n,t,r,e){if(r=typeof r=="function"&&U(r,e,2),!r){if(n===t)return 0!==n||1/n==1/t;e=typeof n;var u=typeof t;if(n===n&&(null==n||null==t||"function"!=e&&"object"!=e&&"function"!=u&&"object"!=u))return false}return xt(n,t,r)},o.isFinite=function(n){return se(n)&&!pe(parseFloat(n))},o.isFunction=hr,o.isNaN=function(n){return vr(n)&&n!=+n
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+n.replace(f,function(t,r,e,o,i,f){return e||(e=o),c+=n.slice(l,f).replace(Z,p),r&&(u=true,c+="'+__e("+r+")+'"),i&&(a=true,c+="';"+i+";\n__p+='"),e&&(c+="'+((__t=("+e+"))==null?'':__t)+'"),l=f+t.length,t}),c+="';",(r=r.variable)||(c="with(obj){"+c+"}"),c=(a?c.replace(R,""):c).replace(N,"$1").replace(T,"$1;"),c="function("+(r||"obj")+"){"+(r?"":"obj||(obj={});")+"var __t,__p=''"+(u?",__e=_.escape":"")+(a?",__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}":";")+c+"return __p}";try{var s=Tr(e,"return "+c).apply(w,i)
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+r=r.slice(0,null==i?o:i)}}else n.indexOf(u,o)!=o&&(u=r.lastIndexOf(u),-1<u&&(r=r.slice(0,u)));return r+e},o.unescape=function(n){return null==n?"":(n=$r(n),0>n.indexOf(";")?n:n.replace(L,b))},o.uniqueId=function(n){var t=++I;return $r(null==n?"":n)+t},o.all=Xt,o.any=ur,o.detect=Gt,o.findWhere=Gt,o.foldl=tr,o.foldr=rr,o.include=Zt,o.inject=tr,Or(function(){var n={};return _t(o,function(t,r){o.prototype[r]||(n[r]=t)}),n}(),false),o.first=Ft,o.last=Dt,o.sample=function(n,t,r){return n&&typeof n.length!="number"?n=_r(n):je.unindexedChars&&mr(n)&&(n=n.split("")),null==t||r?(t=n?n.length:0,0<t?n[jt(0,t-1)]:w):(n=er(n),n.length=ve(ge(0,t),n.length),n)
+},o.take=Ft,o.takeRight=Dt,o.takeRightWhile=Dt,o.takeWhile=Ft,o.head=Ft,_t(o,function(n,t){var r="sample"!==t;o.prototype[t]||(o.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 a(o,u):o})}),o.VERSION=A,o.prototype.chain=function(){return this.__chain__=true,this},o.prototype.toString=function(){return $r(this.__wrapped__)},o.prototype.value=Vt,o.prototype.valueOf=Vt,pt(["join","pop","shift"],function(n){var t=zr[n];o.prototype[n]=function(){var n=this.__chain__,r=t.apply(this.__wrapped__,arguments);
+return n?new a(r,n):r}}),pt(["push","reverse","sort","unshift"],function(n){var t=zr[n];o.prototype[n]=function(){return t.apply(this.__wrapped__,arguments),this}}),pt(["concat","splice"],function(n){var t=zr[n];o.prototype[n]=function(){return new a(t.apply(this.__wrapped__,arguments),this.__chain__)}}),je.spliceObjects||pt(["pop","shift","splice"],function(n){var t=zr[n],r="splice"==n;o.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 a(u,n):u
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\ No newline at end of file
diff --git a/dist/lodash.js b/dist/lodash.js
index 0575ba87b..43ac76c61 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -4,7 +4,7 @@
  * 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>
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <http://lodash.com/license>
  */
 ;(function() {
@@ -50,7 +50,7 @@
    */
   var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
 
-  /** Used to match regexp flags from their coerced string values */
+  /** Used to match `RegExp` flags from their coerced string values */
   var reFlags = /\w*$/;
 
   /** Used to detected named functions */
@@ -66,8 +66,8 @@
   var reNoMatch = /($^)/;
 
   /**
-   * Used to match RegExp special characters.
-   * See this [article on RegExp characters](http://www.regular-expressions.info/characters.html#special)
+   * Used to match `RegExp` special characters.
+   * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
   var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
@@ -100,7 +100,7 @@
     'parseInt', 'setTimeout', 'TypeError', 'window', 'WinRTError'
   ];
 
-  /** Used to make template sourceURLs easier to identify */
+  /** Used to make template `sourceURL`s easier to identify */
   var templateCounter = 0;
 
   /** `Object#toString` result shortcuts */
@@ -188,7 +188,7 @@
     '\xDF': 'ss', '\xD7': ' ', '\xF7': ' '
   };
 
-  /** Used to determine if values are of the language type Object */
+  /** Used to determine if values are of the language type `Object` */
   var objectTypes = {
     'function': true,
     'object': true
@@ -309,6 +309,7 @@
    *
    * @private
    * @param {string} string The string to inspect.
+   * @param {string} chars The chars to find.
    * @returns {number} Returns the index of the first character not found in `chars`.
    */
   function charsLeftIndex(string, chars) {
@@ -328,6 +329,7 @@
    *
    * @private
    * @param {string} string The string to inspect.
+   * @param {string} chars The chars to find.
    * @returns {number} Returns the index of the last character not found in `chars`.
    */
   function charsRightIndex(string, chars) {
@@ -341,7 +343,7 @@
   }
 
   /**
-   * Used by `sortBy` to compare transformed elements of a collection and stable
+   * Used by `_.sortBy` to compare transformed elements of a collection and stable
    * sort them in ascending order.
    *
    * @private
@@ -354,7 +356,7 @@
   }
 
   /**
-   * Used by `sortBy` to compare multiple properties of each element in a
+   * Used by `_.sortBy` to compare multiple properties of each element in a
    * collection and stable sort them in ascending order.
    *
    * @private
@@ -418,7 +420,7 @@
   }
 
   /**
-   * Used by `escape` to convert characters to HTML entities.
+   * Used by `_.escape` to convert characters to HTML entities.
    *
    * @private
    * @param {string} chr The matched character to escape.
@@ -429,7 +431,7 @@
   }
 
   /**
-   * Used by `template` to escape characters for inclusion in compiled
+   * Used by `_.template` to escape characters for inclusion in compiled
    * string literals.
    *
    * @private
@@ -441,7 +443,7 @@
   }
 
   /**
-   * A fallback implementation of `trim` to remove leading and trailing
+   * A fallback implementation of `String#trim` to remove leading and trailing
    * whitespace or specified characters from `string`.
    *
    * @private
@@ -462,7 +464,7 @@
   }
 
   /**
-   * A fallback implementation of `trimLeft` to remove leading whitespace or
+   * A fallback implementation of `String#trimLeft` to remove leading whitespace or
    * specified characters from `string`.
    *
    * @private
@@ -483,7 +485,7 @@
   }
 
   /**
-   * A fallback implementation of `trimRight` to remove trailing whitespace or
+   * A fallback implementation of `String#trimRight` to remove trailing whitespace or
    * specified characters from `string`.
    *
    * @private
@@ -544,7 +546,7 @@
   }
 
   /**
-   * Used by `unescape` to convert HTML entities to characters.
+   * Used by `_.unescape` to convert HTML entities to characters.
    *
    * @private
    * @param {string} chr The matched character to unescape.
@@ -557,7 +559,7 @@
   /*--------------------------------------------------------------------------*/
 
   /**
-   * Create a new `lodash` function using the given context object.
+   * Create a new `lodash` function using the given `context` object.
    *
    * @static
    * @memberOf _
@@ -592,17 +594,17 @@
     /** Used to detect DOM support */
     var document = (document = context.window) && document.document;
 
-    /** Used to restore the original `_` reference in `noConflict` */
+    /** Used to restore the original `_` reference in `_.noConflict` */
     var oldDash = context._;
 
     /**
-     * Used as the maximum length an array-like object.
+     * Used as the maximum length of an array-like object.
      * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
      * for more details.
      */
     var maxSafeInteger = Math.pow(2, 53) - 1;
 
-    /** Used to resolve the internal [[Class]] of values */
+    /** Used to resolve the internal `[[Class]]` of values */
     var toString = objectProto.toString;
 
     /** Used to detect if a method is native */
@@ -624,7 +626,7 @@
         splice = arrayRef.splice,
         unshift = arrayRef.unshift;
 
-    /** Used to set meta data on functions */
+    /** Used to set metadata on functions */
     var defineProperty = (function() {
       // IE 8 only accepts DOM elements
       try {
@@ -651,7 +653,7 @@
         nativeTrimLeft = isNative(nativeTrimLeft = stringProto.trimLeft) && !nativeTrimLeft.call(whitespace) && nativeTrimLeft,
         nativeTrimRight = isNative(nativeTrimRight = stringProto.trimRight) && !nativeTrimRight.call(whitespace) && nativeTrimRight;
 
-    /** Used to lookup a built-in constructor by [[Class]] */
+    /** Used to lookup a built-in constructor by `[[Class]]` */
     var ctorByClass = {};
     ctorByClass[arrayClass] = Array;
     ctorByClass[boolClass] = Boolean;
@@ -743,7 +745,7 @@
      *
      * @private
      * @param {*} value The value to wrap in a `lodash` instance.
-     * @param {boolean} [chainAll=false] A flag to enable chaining for all methods
+     * @param {boolean} [chainAll=false] A flag to enable chaining for all methods.
      * @returns {Object} Returns a `lodash` instance.
      */
     function lodashWrapper(value, chainAll) {
@@ -856,7 +858,7 @@
 
     /**
      * The base implementation of `_.bind` that creates the bound function and
-     * sets its meta data.
+     * sets its metadata.
      *
      * @private
      * @param {Array} data The metadata array.
@@ -917,7 +919,7 @@
           return result;
         }
       }
-      // inspect [[Class]]
+      // inspect `[[Class]]`
       var isObj = isObject(value);
       if (isObj) {
         var className = toString.call(value);
@@ -1071,7 +1073,7 @@
 
     /**
      * The base implementation of `createWrapper` that creates the wrapper and
-     * sets its meta data.
+     * sets its metadata.
      *
      * @private
      * @param {Array} data The metadata array.
@@ -1229,7 +1231,7 @@
     }
 
     /**
-     * The base implementation of `find`, 'findLast`, `findKey`, and `findLastKey`
+     * The base implementation of `_.find`, '_.findLast`, `_.findKey`, and `_.findLastKey`
      * without support for callback shorthands or `this` binding which iterates
      * over `collection` using the provided `eachFunc`.
      *
@@ -1415,7 +1417,7 @@
           (valType != 'function' && valType != 'object' && othType != 'function' && othType != 'object'))) {
         return false;
       }
-      // compare [[Class]] names
+      // compare `[[Class]]` names
       var valClass = toString.call(value),
           othClass = toString.call(other),
           valIsArg = valClass == argsClass,
@@ -1996,7 +1998,7 @@
     };
 
     /**
-     * A fallback implementation of `isPlainObject` which checks if `value` is
+     * A fallback implementation of `_.isPlainObject` which checks if `value` is
      * an object created by the `Object` constructor, assuming objects created
      * by the `Object` constructor have no inherited enumerable properties and
      * that there are no `Object.prototype` extensions.
@@ -2036,11 +2038,17 @@
       var index = -1,
           props = keysIn(object),
           length = props.length,
+          objLength = length && object.length,
           result = [];
 
+      if (typeof objLength == 'number' && objLength > 0) {
+        var allowIndexes = isArray(object),
+            maxIndex = objLength - 1;
+      }
       while (++index < length) {
         var key = props[index];
-        if (hasOwnProperty.call(object, key)) {
+        if ((allowIndexes && key > -1 && key <= maxIndex && key % 1 == 0) ||
+            hasOwnProperty.call(object, key)) {
           result.push(key);
         }
       }
@@ -2093,8 +2101,8 @@
      * _.difference([1, 2, 3], [5, 2, 10]);
      * // => [1, 3]
      */
-    function difference(array) {
-      return baseDifference(array, baseFlatten(arguments, true, true, 1));
+    function difference() {
+      return baseDifference(arguments[0], baseFlatten(arguments, true, true, 1));
     }
 
     /**
@@ -2531,46 +2539,43 @@
      * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
      * // => [1, 2]
      */
-    function intersection(array) {
-      if (!array) {
-        return [];
-      }
+    function intersection() {
       var args = [],
           argsIndex = -1,
           argsLength = arguments.length,
           caches = [],
           indexOf = getIndexOf(),
-          prereq = createCache && indexOf === baseIndexOf,
-          seen = [];
+          prereq = createCache && indexOf === baseIndexOf;
 
       while (++argsIndex < argsLength) {
         var value = arguments[argsIndex];
         if (isArray(value) || isArguments(value)) {
           args.push(value);
           caches.push(prereq && value.length >= 120 &&
-            createCache(argsIndex ? value : seen));
+            createCache(argsIndex && value));
         }
       }
       argsLength = args.length;
       var array = args[0],
           index = -1,
           length = array ? array.length : 0,
-          result = [];
+          result = [],
+          seen = caches[0];
 
       outer:
       while (++index < length) {
-        var cache = caches[0];
         value = array[index];
-
-        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
+        if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value)) < 0) {
           argsIndex = argsLength;
-          (cache || seen).push(value);
           while (--argsIndex) {
-            cache = caches[argsIndex];
+            var cache = caches[argsIndex];
             if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
               continue outer;
             }
           }
+          if (seen) {
+            seen.push(value);
+          }
           result.push(value);
         }
       }
@@ -3248,9 +3253,7 @@
      * // => 'pebbles is 1'
      */
     function chain(value) {
-      value = new lodashWrapper(value);
-      value.__chain__ = true;
-      return value;
+      return new lodashWrapper(value, true);
     }
 
     /**
@@ -4726,7 +4729,7 @@
      * @static
      * @memberOf _
      * @category Functions
-     * @param {...Function} [func] Functions to compose.
+     * @param {...Function} [funcs] Functions to compose.
      * @returns {Function} Returns the new composed function.
      * @example
      *
@@ -4812,7 +4815,7 @@
      * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
      * to the debounced function will return the result of the last `func` call.
      *
-     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * Note: If `leading` and `trailing` options are `true`, `func` will be called
      * on the trailing edge of the timeout only if the the debounced function is
      * invoked more than once during the `wait` timeout.
      *
@@ -5188,7 +5191,7 @@
      * of the `wait` timeout. Subsequent calls to the throttled function will
      * return the result of the last `func` call.
      *
-     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * Note: If `leading` and `trailing` options are `true`, `func` will be called
      * on the trailing edge of the timeout only if the the throttled function is
      * invoked more than once during the `wait` timeout.
      *
@@ -6056,7 +6059,7 @@
     }
 
     /**
-     * Checks if `value` is the language type of Object.
+     * Checks if `value` is the language type of `Object`.
      * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
      *
      * @static
@@ -6076,7 +6079,7 @@
      * // => false
      */
     function isObject(value) {
-      // check if the value is the ECMAScript language type of Object
+      // check if the value is the ECMAScript language type of `Object`
       // http://es5.github.io/#x8
       // and avoid a V8 bug
       // https://code.google.com/p/v8/issues/detail?id=2291
@@ -6112,7 +6115,7 @@
      */
     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)
+      // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
       return isNumber(value) && value != +value;
     }
 
@@ -6282,6 +6285,10 @@
      * // => ['x', 'y'] (property order is not guaranteed across environments)
      */
     var keys = !nativeKeys ? shimKeys : function(object) {
+      var length = object ? object.length : 0;
+      if (typeof length == 'number' && length > 0) {
+        return shimKeys(object);
+      }
       return isObject(object) ? nativeKeys(object) : [];
     };
 
@@ -6306,12 +6313,24 @@
      * // => ['x', 'y', 'z'] (property order is not guaranteed across environments)
      */
     function keysIn(object) {
-      var result = [];
       if (!isObject(object)) {
-        return result;
+        return [];
+      }
+      var length = isArray(object) ? object.length : 0,
+          maxIndex = length - 1,
+          result = Array(length),
+          skipIndexes = length > 0;
+
+      if (skipIndexes) {
+        var index = -1;
+        while (++index < length) {
+          result[index] = String(index);
+        }
       }
       for (var key in object) {
-        result.push(key);
+        if (!(skipIndexes && key > -1 && key <= maxIndex && key % 1 == 0)) {
+          result.push(key);
+        }
       }
       return result;
     }
@@ -6767,7 +6786,7 @@
     }
 
     /**
-     * Escapes the RegExp special characters "\", "^", "$", ".", "|", "?", "*",
+     * Escapes the `RegExp` special characters "\", "^", "$", ".", "|", "?", "*",
      * "+", "(", ")", "[", "]", "{" and "}" in `string`.
      *
      * @static
@@ -7003,7 +7022,7 @@
      * settings object is provided it will override `_.templateSettings` for the
      * template.
      *
-     * Note: In the development build, `_.template` utilizes sourceURLs for easier debugging.
+     * Note: In the development build, `_.template` utilizes `sourceURL`s for easier debugging.
      * See the [HTML5 Rocks article on sourcemaps](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
      * for more details.
      *
@@ -7023,7 +7042,7 @@
      * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
      * @param {Object} [options.imports] An object to import into the template as local variables.
      * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
-     * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
+     * @param {string} [options.sourceURL] The `sourceURL` of the template's compiled source.
      * @param {string} [options.variable] The data object variable name.
      * @returns {Function|string} Returns the interpolated string if a data object
      *  is provided, else the compiled template function.
@@ -7061,7 +7080,7 @@
      * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
      * // => '<li>fred</li><li>barney</li>'
      *
-     * // using the `sourceURL` option to specify a custom sourceURL for the template
+     * // using the `sourceURL` option to specify a custom `sourceURL` for the template
      * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
      * compiled(data);
      * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
@@ -7167,7 +7186,7 @@
         source +
         'return __p\n}';
 
-      // Use a sourceURL for easier debugging.
+      // Use a `sourceURL` for easier debugging.
       // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
       var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';
 
@@ -7267,7 +7286,7 @@
      * @static
      * @memberOf _
      * @category Strings
-     * @param {string} [string=''] The string to trim.
+     * @param {string} [string=''] The string to truncate.
      * @param {Object|number} [options] The options object or maximum string length.
      * @param {number} [options.length=30] The maximum string length.
      * @param {string} [options.omission='...'] The string used to indicate text is omitted.
@@ -7637,7 +7656,7 @@
 
     /**
      * Converts `value` to an integer of the specified radix. If `radix` is
-     * `undefined` or `0` a `radix` of `10` is used unless `value` is a hexadecimal,
+     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal,
      * in which case a `radix` of `16` is used.
      *
      * Note: This method avoids differences in native ES3 and ES5 `parseInt`
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 07bd3ca47..cca3014d3 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -18,47 +18,48 @@ case et:case ut:return n==Wr(t)}if(a=f==H,!a){var p=Yr.call(n,"__wrapped__"),s=Y
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\ No newline at end of file
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index f16b2f735..e6f0d2545 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -4,7 +4,7 @@
  * Build: `lodash underscore -o ./dist/lodash.underscore.js`
  * Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.6.0 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <http://lodash.com/license>
  */
 ;(function() {
@@ -45,8 +45,8 @@
   var reNoMatch = /($^)/;
 
   /**
-   * Used to match RegExp special characters.
-   * See this [article on RegExp characters](http://www.regular-expressions.info/characters.html#special)
+   * Used to match `RegExp` special characters.
+   * See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
    * for more details.
    */
   var reRegExpChars = /[.*+?^${}()|[\]\\]/g;
@@ -91,7 +91,7 @@
     '&#x27;': "'"
   };
 
-  /** Used to determine if values are of the language type Object */
+  /** Used to determine if values are of the language type `Object` */
   var objectTypes = {
     'function': true,
     'object': true
@@ -171,7 +171,7 @@
   }
 
   /**
-   * Used by `sortBy` to compare transformed elements of a collection and stable
+   * Used by `_.sortBy` to compare transformed elements of a collection and stable
    * sort them in ascending order.
    *
    * @private
@@ -184,7 +184,7 @@
   }
 
   /**
-   * Used by `escape` to convert characters to HTML entities.
+   * Used by `_.escape` to convert characters to HTML entities.
    *
    * @private
    * @param {string} chr The matched character to escape.
@@ -195,7 +195,7 @@
   }
 
   /**
-   * Used by `template` to escape characters for inclusion in compiled
+   * Used by `_.template` to escape characters for inclusion in compiled
    * string literals.
    *
    * @private
@@ -207,7 +207,7 @@
   }
 
   /**
-   * Used by `unescape` to convert HTML entities to characters.
+   * Used by `_.unescape` to convert HTML entities to characters.
    *
    * @private
    * @param {string} chr The matched character to unescape.
@@ -223,17 +223,17 @@
   var arrayRef = Array.prototype,
       objectProto = Object.prototype;
 
-  /** Used to restore the original `_` reference in `noConflict` */
+  /** Used to restore the original `_` reference in `_.noConflict` */
   var oldDash = root._;
 
   /**
-   * Used as the maximum length an array-like object.
+   * Used as the maximum length of an array-like object.
    * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
    * for more details.
    */
   var maxSafeInteger = Math.pow(2, 53) - 1;
 
-  /** Used to resolve the internal [[Class]] of values */
+  /** Used to resolve the internal `[[Class]]` of values */
   var toString = objectProto.toString;
 
   /** Used to detect if a method is native */
@@ -342,7 +342,7 @@
    *
    * @private
    * @param {*} value The value to wrap in a `lodash` instance.
-   * @param {boolean} [chainAll=false] A flag to enable chaining for all methods
+   * @param {boolean} [chainAll=false] A flag to enable chaining for all methods.
    * @returns {Object} Returns a `lodash` instance.
    */
   function lodashWrapper(value, chainAll) {
@@ -488,7 +488,7 @@
 
   /**
    * The base implementation of `createWrapper` that creates the wrapper and
-   * sets its meta data.
+   * sets its metadata.
    *
    * @private
    * @param {Array} data The metadata array.
@@ -611,7 +611,7 @@
   }
 
   /**
-   * The base implementation of `find`, 'findLast`, `findKey`, and `findLastKey`
+   * The base implementation of `_.find`, '_.findLast`, `_.findKey`, and `_.findLastKey`
    * without support for callback shorthands or `this` binding which iterates
    * over `collection` using the provided `eachFunc`.
    *
@@ -1182,8 +1182,8 @@
    * _.difference([1, 2, 3], [5, 2, 10]);
    * // => [1, 3]
    */
-  function difference(array) {
-    return baseDifference(array, baseFlatten(arguments, true, true, 1));
+  function difference() {
+    return baseDifference(arguments[0], baseFlatten(arguments, true, true, 1));
   }
 
   /**
@@ -1431,7 +1431,7 @@
          args.push(value);
        }
     }
-    argsLength = args.length
+    argsLength = args.length;
     var array = args[0],
         index = -1,
         indexOf = getIndexOf(),
@@ -1873,9 +1873,7 @@
    * // => 'pebbles is 1'
    */
   function chain(value) {
-    value = new lodashWrapper(value);
-    value.__chain__ = true;
-    return value;
+    return new lodashWrapper(value, true);
   }
 
   /**
@@ -3165,7 +3163,7 @@
    * @static
    * @memberOf _
    * @category Functions
-   * @param {...Function} [func] Functions to compose.
+   * @param {...Function} [funcs] Functions to compose.
    * @returns {Function} Returns the new composed function.
    * @example
    *
@@ -3214,7 +3212,7 @@
    * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
    * to the debounced function will return the result of the last `func` call.
    *
-   * Note: If `leading` and `trailing` options are `true` `func` will be called
+   * Note: If `leading` and `trailing` options are `true`, `func` will be called
    * on the trailing edge of the timeout only if the the debounced function is
    * invoked more than once during the `wait` timeout.
    *
@@ -3538,7 +3536,7 @@
    * of the `wait` timeout. Subsequent calls to the throttled function will
    * return the result of the last `func` call.
    *
-   * Note: If `leading` and `trailing` options are `true` `func` will be called
+   * Note: If `leading` and `trailing` options are `true`, `func` will be called
    * on the trailing edge of the timeout only if the the throttled function is
    * invoked more than once during the `wait` timeout.
    *
@@ -3853,7 +3851,7 @@
     return value && typeof value == 'object' && typeof value.length == 'number' &&
       toString.call(value) == argsClass || false;
   }
-  // fallback for environments that can't detect `arguments` objects by [[Class]]
+  // fallback for environments that can't detect `arguments` objects by `[[Class]]`
   if (!isArguments(arguments)) {
     isArguments = function(value) {
       return value && typeof value == 'object' && typeof value.length == 'number' &&
@@ -4083,7 +4081,7 @@
   }
 
   /**
-   * Checks if `value` is the language type of Object.
+   * Checks if `value` is the language type of `Object`.
    * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
    *
    * @static
@@ -4103,7 +4101,7 @@
    * // => false
    */
   function isObject(value) {
-    // check if the value is the ECMAScript language type of Object
+    // check if the value is the ECMAScript language type of `Object`
     // http://es5.github.io/#x8
     // and avoid a V8 bug
     // https://code.google.com/p/v8/issues/detail?id=2291
@@ -4139,7 +4137,7 @@
    */
   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)
+    // (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
     return isNumber(value) && value != +value;
   }
 
@@ -4467,7 +4465,7 @@
   }
 
   /**
-   * Escapes the RegExp special characters "\", "^", "$", ".", "|", "?", "*",
+   * Escapes the `RegExp` special characters "\", "^", "$", ".", "|", "?", "*",
    * "+", "(", ")", "[", "]", "{" and "}" in `string`.
    *
    * @static
@@ -4493,7 +4491,7 @@
    * settings object is provided it will override `_.templateSettings` for the
    * template.
    *
-   * Note: In the development build, `_.template` utilizes sourceURLs for easier debugging.
+   * Note: In the development build, `_.template` utilizes `sourceURL`s for easier debugging.
    * See the [HTML5 Rocks article on sourcemaps](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
    * for more details.
    *
@@ -4513,7 +4511,7 @@
    * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
    * @param {Object} [options.imports] An object to import into the template as local variables.
    * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
-   * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
+   * @param {string} [options.sourceURL] The `sourceURL` of the template's compiled source.
    * @param {string} [options.variable] The data object variable name.
    * @returns {Function|string} Returns the interpolated string if a data object
    *  is provided, else the compiled template function.
@@ -4551,7 +4549,7 @@
    * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
    * // => '<li>fred</li><li>barney</li>'
    *
-   * // using the `sourceURL` option to specify a custom sourceURL for the template
+   * // using the `sourceURL` option to specify a custom `sourceURL` for the template
    * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
    * compiled(data);
    * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 8fb71b493..f765d2c02 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -4,37 +4,37 @@
  * Build: `lodash underscore -o ./dist/lodash.underscore.js`
  */
 ;(function(){function n(n,r,t){t=(+t||0)-1;for(var e=n?n.length:0;++t<e;)if(n[t]===r)return t;return-1}function r(n,r){var t;n:{t=n.a;var e=r.a;if(t!==e){if(t>e||typeof t=="undefined"){t=1;break n}if(t<e||typeof e=="undefined"){t=-1;break n}}t=0}return t||n.b-r.b}function t(n){return xr[n]}function e(n){return"\\"+Er[n]}function u(n){return Ar[n]}function o(n){return n instanceof o?n:new i(n)}function i(n,r){this.__chain__=!!r,this.__wrapped__=n}function f(n){return K(n)?Gr(n):{}}function a(n,r,t){if(typeof n!="function")return rr;
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+if(typeof r=="undefined"||!("prototype"in n))return n;switch(t){case 1:return function(t){return n.call(r,t)};case 2:return function(t,e){return n.call(r,t,e)};case 3:return function(t,e,u){return n.call(r,t,e,u)};case 4:return function(t,e,u,o){return n.call(r,t,e,u,o)}}return z(n,r)}function c(n){function r(){for(var n=-1,a=arguments.length,c=Array(a);++n<a;)c[n]=arguments[n];if(u){for(var n=u,a=o,l=a.length,p=-1,s=Qr(c.length-l,0),g=-1,h=n.length,v=Array(s+h);++g<h;)v[g]=n[g];for(;++p<l;)v[a[p]]=c[p];
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+if(r(n[u],u,n)===ar)break}return n}function g(n,r,t,e){var u;return t(n,function(n,t,o){return r(n,t,o)?(u=e?t:n,ar):void 0}),u}function h(n,r,t,e){e=(+e||0)-1;for(var u=n?n.length:0,o=[];++e<u;){var i=n[e];if(i&&typeof i=="object"&&typeof i.length=="number"&&(at(i)||H(i))){r||(i=h(i,r,t));var f=-1,a=i.length,c=o.length;for(o.length+=a;++f<a;)o[c++]=i[f]}else t||o.push(i)}return o}function v(n,r,t){var e=-1;t=t(n);for(var u=t.length;++e<u;){var o=t[e];if(r(n[o],o,n)===ar)break}return n}function y(n,r,t,e){if(n===r)return 0!==n||1/n==1/r;
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