Add facilities app

The only thing that currently uses requests is an old load testing management command that doesn't seem to be in use.  It only uses requests in two places so it would be easy to change if the API broke.

I tested the Case List on a domain with data on staging to verify that the updated version of rawes (which should have only bugfixes or backwards compatible new functionality: https://github.com/humangeo/rawes/blob/master/CHANGES.md) didn't break anything, but there might be something else that could be tested.