User sitterheim

Normal map support is working for: - Cocos2D: "collection of images" tilesets with normal and tileset images in the same texture atlas - SpriteKit: "collection of images" tilesets without texture atlas (not recommended) Due to a severe bug in SpriteKit (normal textures do not work if they are in a SKTextureAtlas) I put this task on hold. It's useful and working for Cocos2D users who create their own texture atlases. SpriteKit users will likely see a huge performance penalty due to the texture atlas bug. See here for more info: http://stackoverflow.com/questions/32200330/skspritenode-lighting-doesnt-work-with-textures-from-sktextureatlas I'll be happy to work with Cocos2D devs to improve on the current lighting/normal support if there is any need.