Rebuild docs, files, and update minifiers.

Former-commit-id: 65b04c3efc7677c8ec5cc7ce6e5840fed23b3716

dist/lodash.js

@@ -82,7 +82,7 @@
 
   /** Used to assign default `context` object properties */
   var contextProps = [
-    'Array', 'Boolean', 'Date', 'Error', 'Function', 'Math', 'Number', 'Object',
+    'Array', 'Boolean', 'Date', 'Function', 'Math', 'Number', 'Object',
     'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
     'parseInt', 'setImmediate', 'setTimeout'
   ];
@@ -153,7 +153,6 @@
     var Array = context.Array,
         Boolean = context.Boolean,
         Date = context.Date,
-        Error = context.Error,
         Function = context.Function,
         Math = context.Math,
         Number = context.Number,
@@ -164,7 +163,6 @@
 
     /** Used for `Array` and `Object` method references */
     var arrayProto = Array.prototype,
-        errorProto = Error.prototype,
         objectProto = Object.prototype,
         stringProto = String.prototype;
 
@@ -213,7 +211,6 @@
     ctorByClass[arrayClass] = Array;
     ctorByClass[boolClass] = Boolean;
     ctorByClass[dateClass] = Date;
-    ctorByClass[errorClass] = Error;
     ctorByClass[funcClass] = Function;
     ctorByClass[objectClass] = Object;
     ctorByClass[numberClass] = Number;
@@ -1986,7 +1983,7 @@
       var isArr = isArray(object);
       callback = lodash.createCallback(callback, thisArg, 4);
 
-      if (arguments.length < 3) {
+      if (accumulator == null) {
         if (isArr) {
           accumulator = [];
         } else {