Make "git-send-pack" less verbose by default

Make "git-send-pack" less verbose by default

It used to make sense to have git-send-pack talk about the things it sent
when (a) it was a new program and (b) nobody had a lot of tags and
branches.

These days, it's just distracting to see tons of

	'refs/tags/xyz': up-to-date
	...

when updating a remote repo.

So shut it up by default, and add a "--verbose" flag for those who really
want to see it.

Also, since this makes he case of everything being up-to-date just totally
silent, make it say "Everything up-to-date" if no refs needed updating.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>