UI Lead in

The lead in to the main game edit area. Comfortable with UI Composer and
Director2D and HighLevelUI integration
Updated .gitignore
Fixed RearTouch error in GameScene
Added level designer scene - still to do lots of work on it
Basic UI on LevelEditor
Toggle debug button - not quite working
Added call to end UI onExit
Added .userpreferences to .gitignore - any issues please let me know
Delete StealthOfTomorrow.userprefs

Removing from github
Merge pull request #1 from christopher-mccreadie/SoTLevelEditor

SoT level editor merged