Can now choose between rotating or not. Also has halfWidth/Height.
Removed rotation. Don't ask why.
Merge branch 'master' of https://github.com/WillHuxtable/Piston
Can now specifiy body width/height in options.
Enum-ed the shape types.
Circles and setting mass now work.
Merge branch 'master' of https://github.com/WillHuxtable/Piston.git