[PATCH] --count feature for git shortlog

This is a new feature for short log, which lets you count commits on a per file or repository basis easily.

Currently if you want a total count of commits with shortlog, you would need to add up each authors commits after using --summary. This adds a -N / --count option to shortlog for this purpose. I also created a test. It's not a great test, but it works.

I'm sure I've make a beginner mistake in some part of the process; I've done my best to follow documentation, so please be explicit when you tell me I've done something wrong.

Thanks, Lawrence Siebert

Lawrence Siebert (2):
  shortlog: -N/--count option
  shortlog: added --count test

 builtin/shortlog.c  | 14 +++++++++-----
 shortlog.h          |  1 +
 t/t4201-shortlog.sh |  5 +++++
 3 files changed, 15 insertions(+), 5 deletions(-)