Open Stack

Hey all!

I know that setuptools_git caused some of you a giant headache. I've got
a patch submitted for pbr that replaces it with something that operates
in a smarter manner, and I _think_ addresses the concerns that have been
expressed.

I'd really appreciate if the folks who had concerns would look at it and
poke at it and tell me where it's going to break for them.

https://review.openstack.org/#/c/30522/

Monty