Tests

Add tests for path `api/v2/organizations`. The tests are simple - they only GET and POST to the base URL - but useful. In particular, `OrganizationsTestCase.test_post` appears to reveal a new bug which does not yet exist in the bugzilla database.

Update `ModelFactory` to be more specific. Ensure that it produces a string no more than 255 characters long for its `name` field.

Convert more function and class references into inter-documentation hyperlinks.