/**
  * Mark notification as read.
  *
  * @return object Redirect
  */
 public function markNotification()
 {
     if (Input::get('user_id') === Auth::user()->id) {
         Votes::editNotification(Votes::find(Input::get('id')));
         return Redirect::route('notification_user')->with('status', 'alert-success')->with('message', 'Success! Marked notification as read.');
     } else {
         return Redirect::route('notification_user')->withErrors(array('error' => 'Error! Cannot mark notification as read.'));
     }
 }