Implement image file preview in menus
Refactoring: Using modern syntax for arrays and dictionaries.
Some code folding for long lines.
FileSystemTestCase with new method to copy a test bundle resource to a relative path including a filename.
Test added for intermediate filelookups and smart spritesheets.
UsageManager Singleton, More Events

Made UsageManager a singleton and started adding more events.
Retina support WIP
Retina WIP
Merge remote-tracking branch 'apportable/develop' into retina

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
Retina support for CocosView
Determine backing scale dynamically
Update cocos2d-swift to retina branch
Dynamic body enable visual animated properties
Don't implicitly treat outline items as CCNode instances.
Merge pull request #1207 from cocojoe/usagemanager_improvement

UsageManager Singleton, More Events
Merge pull request #1162 from extrajordanary/image-preview

Image preview in menus
Test refined to assert that intermediate filelookup files are no longer stored within the project files.
Spritesheets are now created in a subpath within the caches folder as well as the intermediate filelookup.
Tests adjusted to reflect this as well as placing spritesheets within a subfolder.
Merge pull request #1213 from NickyWeber/improvment/#1158_better_git_workflow

Improvment/#1158 better git workflow
Merge pull request #1209 from rkachowski/bugfix/scrubberNode

Don't implicitly treat outline items as CCNode instances.
Update cocos2d version.