Merge pull request #133 from jtwigg/develop

Develop
Fixes export of bitmap fonts
Updates Cocos2D
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop
all ARC readiness issues fixed (as far as compilation is concerned)
ARC readiness: leave ThoMo as MRC, remove SCEvent bridge casts
ARC readiness: keep some other libs MRC for now
WIP Issue#130 : First draft of Audio Preview resource manager.
Merge branch 'develop' of https://github.com/apportable/SpriteBuilder into develop
Issue#130 adjust Audio preview based on feedback.
Rename files for Audio Preview.
Fix up name property of CCNode to appear under Visible check.
Merge pull request #134 from jtwigg/develop

Develop
Fixes #131
Updates Cocos2d
ARC conversion succeeded (SB unusable in current state)
fixed scene nodes not retained
added WARN macro, warn use of cocosscene singleton when nil
fixed several (unrelated) analyzer warnings
some xib change (plugin version, from xcode)