Tweak db settings

* settings.py no longer has db configuration
* settings_local.py-dist defaults to a dev-env friendly configuration
  which uses sqlite3 and should work out of the box
Docs overhaul

* We're in the middle of reworking how the project gets deployed and
  thus the docs were horribly wrong. For now, I nerfed them.
* I also went through and removed a bunch of things that were outdated
  and incorrect.