title: How to rotate an SKSpriteNode around the node's Y-axis?
body: <p>I'm trying to rotate an SKSpriteNode node around it's Y-axis. I know there's the zRotation property and that will rotate the node clockwise or counter-clockwise; however, I'd like to rotate the node around it's own Y axis (like a dancing ballerina for instance), and I can't seem to find any functionality to do so.  What is the best recommended way of doing this?</p>