docs(): add default values

js/angular/service/loading.js

@@ -56,10 +56,10 @@ function($document, $ionicTemplateLoader, $ionicBackdrop, $timeout, $q, $log, $c
      * @param {object} opts The options for the loading indicator. Available properties:
      *  - `{string=}` `template` The html content of the indicator.
      *  - `{string=}` `templateUrl` The url of an html template to load as the content of the indicator.
-     *  - `{boolean=}` `noBackdrop` Whether to hide the backdrop.
-     *  - `{number=}` `delay` How many milliseconds to delay showing the indicator.
+     *  - `{boolean=}` `noBackdrop` Whether to hide the backdrop. By default it will be shown.
+     *  - `{number=}` `delay` How many milliseconds to delay showing the indicator. By default there is no delay.
      *  - `{number=}` `duration` How many milliseconds to wait until automatically
-     *  hiding the indicator.
+     *  hiding the indicator. By default the indicator will be shown until `.hide()` is called.
      */
     show: showLoader,
     /**