Merge pull request #166 from mbebenita/master

Got main Box2D test case sorta working.
Moves build folders out of the extension/firefox/ and web/
Moves video control behind the canvas
Merge pull request #169 from yurydelendik/video-layers

Moves video control behind the canvas
Count analysis passes.
We don't have open methods for interface bindings yet.
Don't cache memoized trampolines.