Remove test cruft
Remove tests/settings. Using conftest instead.
Reinstate OPTIONS tests
Model fields with .blank or .null now map to required=False. Closes #2017. Closes #2021.
Use select inputs for relationships. Closes #2058.
Split out .create and .update on ListSerializer
Refactor many
Merge branch 'master' of https://github.com/tomchristie/django-rest-framework