Box2D boxing ragdoll 3

Moved to iPhone, added basic detection of punches, health meter, and weakness as health approaches zero. Also implemented basic network connection. This is being recorded from the simulator by using glReadPixels to dump every third frame into a bmp file - that's why the motion is a bit stuttery. I am playing the left fighter remotely from my iPod touch, and the right fighter using the mouse on the simulator, so it's a bit hard to get a realistic looking fight going...