Integrate RNA
Add api-token-auth to urls
Add stackato support
Add django-extensions
Add REST_FRAMEWORK settings
Update RNA
Update to latest RNA and use new filter backend

Set rna.filters.TimestampedFilterBackend to be the new
default filter backend.

Add django-filter dependency to vendor-local.

Switched to clients branch
Update RNA from clients branch
Add settings.RNA with nucleus-pg default

Also add settings.SECURE_PROXY_SSL_HEADER
Use HyperlinkedModelSerializerWithPkField

By default
Switch to postgresql db
Move RNA submodule to mozilla/rna repo and master branch.
Merge pull request #3 from Osmose/integrate-rna

Integrate rna