Since Ryan's git-annotate is much faster, and has support for renames,
it is likely it goes into the mainstream git soon. Adapt it a little to
work with gitcvs, and actually use it.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>