title: Use Spine in Cocos2dx
body: <p>In cocos2dx, I use the class <code>skeletonAnimation</code> to create the skeleton animation which uses the resources exported by spine. We know the class <code>skeletonAnimation</code> is the subclass of node not is sprite.<br>
   How to do to make the skeleton animation flip the node as it like to use the method <code>setFlippedX()</code> in sprite node.</p>