initial broken cell locking.
Merge branch 'develop' of https://github.com/jtwigg/SpriteBuilder into locked_cell

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
	SpriteBuilder/ccBuilder/en.lproj/MainMenu.xib
Fix memory leaks and optimize memory usage.
Fix readonly InspectorFloatCheck’s
working locked joints and SequencerJoint.