Import magit-1.2.0.50nb20130621 as wip/magit-git.

Magit is an interface to the version control system Git, implemented as
an extension to Emacs.  Magit supports GNU Emacs version 22 or later.

With Magit, you can inspect and modify your Git repositories with Emacs.
You can review and commit the changes you have made to the tracked
files, for example, and you can browse the history of past changes.
There is support for cherry picking, reverting, merging, rebasing, and
other common Git operations.

Magit is not a complete interface to Git; it just aims to make the most
common Git operations convenient.  Thus, Magit will likely not save you
from learning Git itself.

This is Github version of devel/magit.
Add magit-git.
Updated to latest release. Package is ready for import. From NEWS:

 * Fix CityHash32() so platforms that disagree about whether 'char' is signed
   use the same mathematical function.  For most people this changes nothing
   as most popular platforms agree with x86 about whether 'char' is signed.
 * No changes to any of the functions, unless you had been using CityHash32()
   despite "make check" reporting a failure on your platform.
 * Slightly modernize and improve configuration and portability.