-------------------
Added
.....
* Extended linting to include ``flake8-aaa`` to lint tests.
Changed
.......
* Bumped version of ``requests`` in requirements to ``2.19.1``, but kept
requirement in ``setup.py`` the same at ``>=2.18``.
* Improved output in stacktraces when ``RevisionMismatch`` is raised. Now
includes URL of resource and any revision number that was sent.