Rebuild of box2d.js on OS X
Backport the fix at http://box2d.org/forum/viewtopic.php?f=4&t=7796 into this build of Box2D
Rebuild box2d.js
Consider collision masks in the b2BroadPhase
Remove code that is now unsupported because of broadphase filtering.
Rebuild box2d.js
Remove deleted groupIndex attribute
Rebuild box2d.js