added Sprite Kit Node plugins: label, sprite, sprite with color
fix crash when trying to "Save As" due to deallocated SavePanelLimiter
more tests with SK node plugins

Conflicts:
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental.xcodeproj/project.pbxproj
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SBViewController.m
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/Source/Resources/Published-Android/MainScene.ccbi
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/Source/Resources/Published-iOS/MainScene.ccbi
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/SpriteBuilder Resources/MainScene.ccb
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/SpriteBuilder Resources/MainScene.ccb.ppng
sprite kit nodes work with reader (wip)

Conflicts:
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/CCBReader/CCBReader.h
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/CCBReader/CCBReader.m
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/CCBReader/SpriteKit/CCBSpriteKitReader.m
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/Source/Resources/Published-Android/MainScene.ccbi
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/Source/Resources/Published-iOS/MainScene.ccbi
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/SpriteBuilder Resources/MainScene.ccb
	Test/SpriteKitReader-Experimental/SpriteKitReader-Experimental/SKReaderTestData.spritebuilder/SpriteBuilder Resources/MainScene.ccb.ppng