@Issue#44 WIP Add warning outline to the left tab bar. Remove Tab Button.
Merge branch 'develop' into issue_44

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
	SpriteBuilder/ccBuilder/AppDelegate.m
Merge branch 'develop' of https://github.com/apportable/SpriteBuilder into issue_44
@Issue#44 add warning icons to Warning Cells
@Issue#55 Fix undo when shortening timeline and chopping off keyframes
@Issue#56 Added missing release of very large image.
@Issue#29 refine lock/hidden options to work more like PhotoShop
Merge pull request #70 from jtwigg/develop

Develop