#7 ask before quitting when there are dirty buffers
#7 add a test and minor refactoring
Merge issue 7: branch 'issue/fix-quit-7'
Merge issue 7: branch 'master' into issue/open-quickly

Conflicts:
	VimR/VRAppDelegate.m
	VimR/VRWorkspace.m
	VimRTests/VRAppDelegateTest.m
	VimRTests/VRWorkspaceTest.m