fix(orderBy): Modify docs and add test for array-like object.

BREAKING CHANGES:

These changes alter the behavior of AngularJS such that it will no
longer throw an error for non array values, as it will accept
array-like values as well. It will throw an error if no array-like
value is passed.

Author: nhodges

docs/content/error/orderBy/notarray.ngdoc

@@ -1,20 +1,20 @@
 @ngdoc error
 @name orderBy:notarray
-@fullName Not an array
+@fullName Value is not array-like
 @description
 
-This error occurs when {@link ng.orderBy orderBy} is not used with an array:
+This error occurs when {@link ng.orderBy orderBy} is not passed an array-like value:
 ```html
 <input ng-model="search">
 <div ng-repeat="(key, value) in myObj | orderBy:search">
   {{ key }} : {{ value }}
 </div>
 ```
 
-orderBy must be used with an array so a subset of items can be returned.
-The array can be initialized asynchronously and therefore null or undefined won't throw this error.
+orderBy must be used with an array-like value so a subset of items can be returned.
+The array can be initialized asynchronously and therefore `null` or `undefined` won't throw this error.
 
-To orderBy an object by the value of its properties you can create your own array based on that object:
+To use orderBy to order the properties of an object, you can create your own array based on that object:
 ```js
 angular.module('aModule', [])
   .controller('aController', function($scope) {

test/ng/filter/orderBySpec.js

@@ -13,6 +13,10 @@ describe('Filter: orderBy', function() {
         toThrowMinErr('orderBy', 'notarray', 'Expected array but received: {}');
     });
 
+    it('should not throw an exception if an array-like object is provided', function() {
+      expect(orderBy('cba')).toEqual(['a', 'b', 'c']);
+    });
+
     it('should return sorted array if predicate is not provided', function() {
       expect(orderBy([2, 1, 3])).toEqual([1, 2, 3]);