Refactoring: Step 1 of N - Splitting up previews in viewController and separate xibs.
Refactoring: ResourceManagerOuntlineHandler tidied up.
Removed obsolete #imports.
Cast some interger values to NSUInteger remove warnings.
Removed obsolete IBOutlets and ivars.
Removed old initializer.
Refactoring: Tidied up AppDelegate.
Removed old preview loading coding.
Refactoring: Image preview added.
Refactoring: Sprite Sheet preview added.
TrimSpaces not needed for images: removed property.
Refactoring: CCB preview added.
Refactoring: Removed obsolete ResourceManagerPreviewView.
Refactoring: Tests for previews adjusted.