fix potential issue with audio manager
Initial body and physics implementation
remove chipmunkjs
Add/remove some comments/todo
initial quadtree implementation
Renamed DisplayObjectContainer to Container
rename font -> text
typo and jshint cleanup
doc update
change naming of bounds left/right
new rectangle with more properties
Add bounds to world
Move physics and object factories to states, generalize factory a bit
physics collider code prep
Don't need those
or that
jshint cleanup and fixes
fix some build issues
initial collision implementation
stupid typos and jshint fixes