Start laying groundwork for Django REST Framework.
More work.
Some more work.

Feeling pretty lazy for this one...
Basic API functionality.
More API work.
Rearrange API directories a little.
Start writing API tests.
Enable API Token generation, revokation.
Remove some junk and fix some stupidity.
Start API docs.
More API work.
Finish core API, start API tests.
Incremental test improvements.
Fix stupidity.
More fix.
Get API tests working.
Switch to updated version of user detail view.
Add djangorestframework to requirements.
Return systems as URLs from interfaces.
Make some related objects links and add label, domain fields.