GUAC-1378: Add service for communicating with the /api/patches REST endpoint.

guacamole/src/main/webapp/app/rest/services/cacheService.js

@@ -48,6 +48,13 @@ angular.module('rest').factory('cacheService', ['$injector',
      */
     service.languages = $cacheFactory('API-LANGUAGES');
 
+    /**
+     * Cache used by patchService.
+     *
+     * @type $cacheFactory.Cache
+     */
+    service.patches = $cacheFactory('API-PATCHES');
+
     /**
      * Cache used by schemaService.
      *