Start FileUtil unit tests
Merge branch 'develop-v3' of https://github.com/cocos2d/cocos2d-iphone into develop-v3

Conflicts:
	cocos2d-ios.xcodeproj/project.pbxproj
Remove old tests folder, remove old tests project.
Add ui-test classes and methods automatically.
Re-enabling area/density methods.
Add unit tests to the test project instead of library project.
Rename ui-tests to just tests
Final project cleanup- tests are moved
UI tests for physics.
merging
Merge branch 'develop-v3' of github:cocos2d/cocos2d-iphone into develop-v3