Package document type added, mainly for registering icon.
Package icon shown in file view.
RMPackage tests added.
Test helper to assert equality of strings added.
ProjectSettings: Added method move resource paths.
ResourceManagerOutlineHandler: Dependency to project settings injected.
Dependency to appDelegate reduced.
Bugfix: Wrong parameter passed to fileManager to detect if a file is a directory.
Resource file view: Hitting ESC while editing will abort editing.
Packages can be renamed.
NSError category added to set error pointers conveniently with given or new errors.
Error pointers set with NSError category to prevent crashes if error pointer is nil and reduce code clutter.
Documented moveResourcePath method.