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	states. and the new return-value convention.  These are not
	actually used yet, just set.

	* vc-svn.el (vc-svn-parse-status): Set 'ignored and 'unregistered
	states when appropriate.

	* vc-hg.el (vc-hg-state,vc-hg-dir-state): Set 'ignored and
	'unregistered' when appropriate.

	* vc-git.el: Document that we don't set the new states yet.

	* vc.el (vc-dired-state-info): Display 'unregistered and
	'ignored states.

	* vc-cvs.el (vc-cvs-parse-status): Set the 'ignored state when
	appropriate.

	* vc-bzr.el (vc-bzr-dir-state): Set 'ignored and
	'unregistered' when appropriate.