Revert "Debugging the switch to PostgreSQL"

This reverts commit c846e33f2440defd26d26b82f46aeb132dd5bfa0.
Revert "Revert "Maybe PostgreSQL will work now?""

This reverts commit b3aacd88871c4bdd84988956970deaf017a1e128.
Revert "Maybe PostgreSQL will work now?"

This reverts commit 9b221cba63ca4be411221e87becbfc59956fc660.
Revert "Trying to get Travis to be friends with PostgreSQL"

This reverts commit 35e1598c36d7928660711c9e2cd2d47a1c4823bf.
Revert "Trying to fix configuration issues"

This reverts commit b10e6f28c0ba82325b6cf1e0176fb30d3a0607cf.
Revert "Missed psycopg2 pip install in .travis.yml"

This reverts commit eacea6a1c3739ce90c026de7737cd8b59c1d9449.
Revert "Moved settings around"

This reverts commit f12dc91116936518e3ef1d2ef8ae59d2bd18ad7d.
Revert "Forgot to remove mysql from pip install in .travis.yml"

This reverts commit 4cd741d67dd974b6f629720027e703cfe8605f02.
Revert "Change to PostgreSQL"

This reverts commit 4411d547382c275597432789375defc3ae878f51.
Trying minimal changes to switch over to PostgreSQL