Summary: A simple git wrapper to capture output

Description:
This is a simple wrapper of a 'git' executable. The strength is that you
can run a 'git' command and capture the output in a simple and more
portable way than using 'open' to pipe (which is not always implemented
fully).

As of this writing, most of the git commands simply returns the output, but
this will be changed in the near future, especially when called in the list
context, where we may want sort of processed data like what files are
affected etc.

Maintainer: nobody