[PATCH] git-cvsimport-script: add "import only" option

[PATCH] git-cvsimport-script: add "import only" option

git-cvsimport-script: add "import only" option which tells the script
not to perform a checkout after importing.

This ensures that the working directory and cache remain untouched and
will not create them if they do not exist.

Acked-by: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>