For a given project the directory used with the -w option is almost always
the same each time. Let it be specified with 'cvsexportcommit.cvsdir' so
it's not necessary to manually add it with -w each time.
Signed-off-by: Trent Piepho <tpiepho@freescale.com> Acked-by: Robin Rosenberg <robin.rosenberg@dewire.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>