Updating Chipmunk reference
Fix opacity binary reader.
Merge pull request #5 from jtwigg/develop-v3

Fix opacity binary reader.
Slightly improved fire effect
Fire positioning
Merge branch 'develop-v3' of github:cocos2d/cocos2d-iphone into develop-v3
Layout updated upon change direction.
Merge pull request #489 from cocojoe/develop-v3

The big documentation commit
Merge branch 'develop-v3' of https://github.com/cocos2d/cocos2d-iphone into develop-v3
cleanup CCTransitions to avoid leaking.
CCPhysics retain cycle bug fix + unit tests.
Merge branch 'develop-v3' of github:cocos2d/cocos2d-iphone into develop-v3
Make CCPhysicsNode debug drawing more visible.
Clamp float colors when converting to fixed point.