add sprite kit texture atlas script to pbxproj
sk texture atlas gen minro changes
Publisher: SK spritesheet check tool exists, additional warnings/errors
pbxproj: remove texture atlas script, added txt file with location to texture atlas tool
pbxproj: changed the target for the texture atlas tool .txt file
Publisher: cleanup
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop-steffen

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
Bugfix for issue #46 Deleting folder with Interface files nested underneath, and then saving.
If a tab was open for a certain file and that file was deleted by deleting a parent folder the tab would be kept open. Saving now caused the crash since there was no valid currentDocument any more.
Solution: Close the tab as soon as a file gets deleted by deleted parents.
SB: publisher exports spriteFrame property first (Sprite Kit exports only)
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop-steffen

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
update SB+SK submodule ref
Ignoring CocoaPod files(future stuff) and AppCode project related files.
Bugfix: Caching is broken #294.
Fix is improving performance but is more like a quick solution than solving the underlying complexity problem.
fix drag and drop reassignment.
Fix position incorrect upon body drag and drop.
fine tune outlets.
cocosscene updated.
fixup icon.
Physics Touch tweaks.
Merge pull request #299 from KoboldKit/develop-steffen

SK Texture Atlas generation finished
Updates Cocos2D
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop