Propagate setup.py change from common.
Propagate setup.py change from common.

This pulls in the following patch:

commit 8a967b16dc2ffd60bc19bee09f45e665ddcc9a81
Author: Monty Taylor <mordred@inaugust.com>
Date:   Mon Jul 2 17:19:06 2012 -0400

    Fix up openstack-common build.

    Ironically enough, even though the code to manage this is in
    openstack-common, openstack-common wasn't using it. This patch fixes doc
    generation, as well as setuptools-git integration and versioning.

Change-Id: Ibb2041b131c67aba963e2dd81dcdfd105e1f9b33

n0ano/gantt,n0ano/gantt