update SpriteKit project template: new icons, remove published resources, default to not export "phone" resources
SK plugin node: fix incorrect rotation
update SK submodule ref
publisher: extracted spritesheet generation into its own method
SK texture atlas generation script
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop-steffen
publish Sprite Kit texture atlas
update SK submodule ref
SK texture atlas: export one atlas to each individual resource-xxx folder
sktextureatlas export: texture atlas error detection and logging
Merge pull request #296 from jtwigg/develop

Develop
Merge pull request #295 from KoboldKit/develop-steffen

SK: load image from atlas, various bugfixes, new icons
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
Merge pull request #304 from jtwigg/develop

Develop