Resource Manager: ActionController added to encapsulate actions.
File view's context menu generated by code.
ResourceMenuItem passing along the selection of the outline view.
File outline's context menu removed from xib.
RMPackage's debug method with some more helpful output.
Modal dialogue convenience category added for NSAlerts.
Resource manager related action's logic removed and invoked on ResourceActionController.
ResourceManagerOutline context menu created with ResourceContextMenu.
Key down delete trigger actionController.
Removed everything obsolete.
Warnings removed.
ResourceActionController setup in appdelegate and strong reference kept there.
Subsequent manual dependency injection for ResourceManagerIutlineView.
Bugfix for right click highlichting in file view.
ResourceActionController pulls selected resources from outline view.
AppDelegate less selection dependent, just invoking actions on controller.
ResourceContextMenu simplified.
Removed ResourceMenuItem since selection is pull from outline.
Resource related actions extracted into command classes.
Contextual menu's entries derived from command classes.
Dependencies of resource commands to AppDelegate reduced.
MainWindow injected to ResourceCommandController and passed on to commands.
ResourceManager injected as dependency for commands.
Extracted redundant code from ResourceNewFile and ResourceNewFolderCommand to ResourceManager.
Resource commands to open in finder and external editor: Moved redundant code to a resource base class.
Resource view context menu with more tests.
Resource types enum now as a typedef.
ResourceContextMenu shows all entries just disables non applicable ones.
ResourceContextMenu: Open in external editor working as expected.
Does not make sense for ccbs and folders.
Merge branch 'feature/#501_packages_step_one' into feature/#501_refactoring_resource_actions

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
	SpriteBuilder/ccBuilder/AppDelegate.m
	SpriteBuilder/ccBuilder/ResourceManagerOutlineView.m