(vc-next-action-dired): Use dired-do-redisplay. Handle

(vc-next-action-dired): Use dired-do-redisplay.  Handle
window configuration correctly.
(vc-next-action): Save window configuration for vc-next-action-dired.
(vc-finish-logentry): Only kill log buffer if it does exist.
(vc-dired-mode): Rewritten so that it works entirely through
dired-after-readin-hook.  Subdirectories are handled just as in
ordinary dired.
(vc-dired-hook): New function.
(vc-state-info, vc-dired-reformat-line): Adapted.
(vc-dired-update, vc-dired-update-line): Removed.
(vc-directory): Rewritten.
(vc-directory-18): Removed.
(vc-dired-mark-locked): New function, bound to "*l" in vc-dired-mode.
(vc-do-command): Only compute vc-name if it is really needed.
(vc-fetch-cvs-status): New function.
(vc-dired-hook): Use it.