Move to stackforge

Update URLs in the documentation for the source and
bug tracker.

Add a .gitreview file to make reviews work.

Change the "style" tox env to "pep8" to be consistent with
the check job expectations.

Change-Id: I5dd1e157e11ef597dd22ab2e3f5d1219f0489a7e
driver: remove useless arg propagate_map_exceptions

Change-Id: Id3cc95ebe26b10d4da1aa978c2c818e199be316e
Add contributing instructions for github mirrors

Change-Id: I78ae4977b7f005e4b47aa736ed4594cd994fd3ca
Merge pull request #2 from dreamhost/master

latest from upstream