Change joint pngs.
Disable dynamic bodies when physics bodies.
SB+SK submodule, updates SK reader to version 8
Merge pull request #382 from KoboldKit/develop-steffen

SB+SK submodule, updates SK reader to version 8
Updates default Sprite Kit project
Merge pull request #385 from jtwigg/develop

Develop
Updates code signing for beta release
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop
Updates Cocos2D