Fix API docs per #1041

lib/model.js

@@ -362,11 +362,11 @@ Model._getAccessTypeForMethod = function(method) {
 };
 
 /**
- * Get the `Application` the Model is attached to.
+ * Get the `Application` object to which the Model is attached.
  *
- * @callback {Function} callback
- * @param {Error} err
- * @param {Application} app
+ * @callback {Function} callback Callback function called with `(err, app)` arguments.
+ * @param {Error} err Error object; see [Error object](http://docs.strongloop.com/display/LB/Error+object).
+ * @param {Application} app Attached application object.
  * @end
  */