Updating example for github page

Author: joni2back

index.html

@@ -48,6 +48,7 @@
       var defaults = config.$get();
       config.set({
         appName: 'angular-filemanager',
+        listUrl: 'listing-response-example.json',
         pickCallback: function(item) {
           var msg = 'Picked %s "%s" for external use'
             .replace('%s', item.type)