Change error handling to account for youtube issues.

[warcode]

Check videocache for existing videos to show videos to the user if Youtube has returned them at some point.

The chances of a user re-privatizing subscriptions is much smaller than youtube failing at APIs.

@@ -103,9 +103,9 @@ ytsubgridApp.controller( 'AppRepeatCtrl',
             }
           } );
         }
      } else if ( code == 403  && $scope.videocache.length <= 0) {
         $scope.forbidden = 1;
      } else if ($scope.videocache.length <= 0) {
         $scope.notfound = 1;
      } else {
        //Show videos, but show error/warning toast to user
      }

@@ -123,10 +123,10 @@ ytsubgridApp.controller( 'AppRepeatCtrl',

           checkData();
         }
      } else if ( code == 403 && $scope.videocache.length <= 0) {
         $scope.start = true;
         $scope.forbidden = 1;
      } else if ($scope.videocache.length <= 0) {
         $scope.start = true;
         $scope.notfound = 1;
       } else {
        //Show videos, but show error/warning toast to user
      }

[daviddeutsch]

Woops, didn't see this before opening #67 - will keep it open for reference.