Initial skeleton and tests

Bringing in code from ndoh
There are lots of independent assertions in this test. Rather break it up into smaller tests (which seems a bit silly) or group everything into a single assertion, perhaps something like this:
```python
self.assertEqual({"accounts": 1, "conversations": 1}, {
    "accounts": UserAccount.objects.all().count(),
    "conversations": Conversation.objects.all().count(),
})
```