add count to relations and scopes

Signed-off-by: Jaka Hudoklin <jakahudoklin@gmail.com>

lib/models/model.js

@@ -503,6 +503,13 @@ Model.scopeRemoting = function(scopeName, scope, define) {
     http: {verb: 'delete', path: '/' + pathName},
     description: 'Deletes all ' + scopeName + ' of this model.'
   });
+
+  define('__count__' + scopeName, {
+    isStatic: isStatic,
+    http: {verb: 'get', path: '/' + pathName + '/count'},
+    description: 'Counts ' + scopeName + ' of ' + this.modelName + '.',
+    returns: {arg: 'count',  type: 'number', root: true} 
+  });
 };
 
 Model.nestRemoting = function(relationName, options, cb) {