Bee Cave Games

We're excited to try mesh deformation!  We had to upgrade our Spine run-time, of course, and I took the time to examine what local changes we had made.  I'd like to submit these changes back to you guys, for possible inclusion in the official Spine run-times for ActionScript and Starling.  (See the commit comments for more details, of course).

I'd appreciate any feedback on these changes as well!  Thanks for all your hard work.