Old pbr did some funny things when you tried to install on repos without
tags. Bump the pbr dep so that we get deterministic behavior out of pbr
even without tags.
We should also consider making a tag or two anyways just to get
something under pbr as not everyone may have updated pbr.
Make repo support 'tox -epep8' as we want this to be the first gating
Don't make any actual code changes, just change setup and add files.
Further work is needed to re-organize the code, but that can be in a