docs($cacheFactory): add example

src/ng/cacheFactory.js

@@ -37,6 +37,46 @@
  * - `{void}` `removeAll()` — Removes all cached values.
  * - `{void}` `destroy()` — Removes references to this cache from $cacheFactory.
  *
+ * @example
+   <example module="cacheExampleApp">
+     <file name="index.html">
+       <div ng-controller="CacheController">
+         <input ng-model="newCacheKey" placeholder="Key">
+         <input ng-model="newCacheValue" placeholder="Value">
+         <button ng-click="put(newCacheKey, newCacheValue)">Cache</button>
+
+         <p ng-if="keys.length">Cached Values</p>
+         <div ng-repeat="key in keys">
+           <span ng-bind="key"></span>
+           <span>: </span>
+           <b ng-bind="cache.get(key)"></b>
+         </div>
+
+         <p>Cache Info</p>
+         <div ng-repeat="(key, value) in cache.info()">
+           <span ng-bind="key"></span>
+           <span>: </span>
+           <b ng-bind="value"></b>
+         </div>
+       </div>
+     </file>
+     <file name="script.js">
+       angular.module('cacheExampleApp', []).
+         controller('CacheController', ['$scope', '$cacheFactory', function($scope, $cacheFactory) {
+           $scope.keys = [];
+           $scope.cache = $cacheFactory('cacheId');
+           $scope.put = function(key, value) {
+             $scope.cache.put(key, value);
+             $scope.keys.push(key);
+           };
+         }]);
+     </file>
+     <file name="style.css">
+       p {
+         margin: 10px 0 3px;
+       }
+     </file>
+   </example>
  */
 function $CacheFactoryProvider() {