Emacs mode for git

Here's the beginning of an Emacs mode for git. My primary goal at this
point is to replicate the behavior of the pcl-cvs mode.

Most basic functions are implemented (diff, commit, revert, add/remove
files, .gitignore, etc.) There is currently no support for multiple
branches or file merges. The code has been tested only on Emacs 21, it
will probably need some tweaking to run on XEmacs.

Feedback welcome...

-- 
Alexandre Julliard
julliard@winehq.org