use Crafty inbuilt .Multiway()

http://craftyjs.com/api/Multiway.html
Merge branch 'master' of https://github.com/SurrenderMonkeys/sm-gamecraft-2013
objects
Merge branch 'master' of https://github.com/SurrenderMonkeys/sm-gamecraft-2013
index and collidable objects
Merge branch 'master' of https://github.com/SurrenderMonkeys/sm-gamecraft-2013

Conflicts:
	src/game.js
removes non-index