Merge branch 'dsuch-r-gh236-async-postgres'
GH #256 - Deal with SQL reconnects, ensure connections exist before issuing queries.
Merge branch 'dsuch-f-gh256-sqlalchemy-restart'
GH #256 - We use pg8000 as our Postgres driver now.
Merge branch 'dsuch-f-gh256-gunicorn-restarts'
Removed unused imports (pyflakes).
Patch butler so it doesn't compare types directly.
Merge branch 'master' into dsuch-f-gh265-cassandra-client