Update to Django Rest Framework 3.12.2 with improved schema generation.
However, it is still not quite complete for what we need (and what we currently postprocess for). Instead of postprocessing, this commit introduces our own extended generator to add the missing fields.
Once this is vetted good, we can remove contrib/postprocess-openapi-schema.py
Also added better comments to api/views.py which will end up in schema docs
Signed-off-by: Corey Shields <cshields@gmail.com>
83f9b07e21