title: ion-slide-box Update Issue
body: <pre><code>&lt;ion-slide-box&gt;
       &lt;ion-slide ng-repeat="imageUrl in item.images"&gt;
                &lt;img ng-src="{{imageUrl}}" /&gt;
        &lt;/ion-slide&gt;
  &lt;/ion-slide-box&gt;
  </code></pre>
  
  <p>and my Controller:</p>
  
  <pre><code>$scope.changeItem = function(differentItem) {
          $scope.item = differentItem;
          //$scope.$apply();
          $ionicSlideBoxDelegate.update();
      };
  </code></pre>
  
  <p>Whenever the changeItem() button is clicked, it changes $scope.item which i use in ng-repeat(in slide-box).</p>
  
  <p>My problem here is that <code>$ionicSlideBoxDelegate.update();</code> doesn't update and set the pager index to 0 with the new number of images of the selected item even though the $scope.item changes.</p>