Version 0.7.0 has a conflicting pbr requirement, so we need to update
the requirements and produce a new release. Making our tools work after
importing into gerrit required several updates simultaneously:
1. Update requirements based on our global-requirements list.
2. Fix tox.ini so tests pass for 2.7 and 3.4.
3. Skip a test that is failing for 3.4 until we have more time to debug.
4. Fix the .gitreview settings to point to the right repository.
5. Add skeleton documentation structure.
6. Add links to the README in a format understood by our release tools.
Related-bug: #1403214
Change-Id: I28213fb1dbb76a8640d7aa7dc844a7b593d1c6da