SB+SK update
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop-steffen
export contentSize property of buttons to fix size issue
sb+sk
enable localizable text for labels
sb+sk submodule
sb+sk again
can have children == no for label nodes
Merge pull request #362 from KoboldKit/develop-steffen

some smaller fixes related to button size, localization