Update and draw only on MainEventsCleared.
Update and draw only on MainEventsCleared.

I think this was left over by some sort of merge mistake? d2a1fe9 moved
state.update() and state.draw() into the MainEventsCleared handler,
where they should be, but somehow they wound up outside again.  Anyway,
this fixes FPS issues in astroblasto on my machine.

ggez/ggez