* Add Heroku configuration
* Add links in API description
* Read database connection string from DATABASE_URL environment variable
* Restructure settings files for production
* Run server using gunicorn and servce static files with whitenoise
* Install drf-yasg from source instead of pypi in testproj
* Add readme links to demo app
* schema generation implemented via coreapi Document and openapi_codec
* schema interface selectable from the latest versions of swagger-ui and redoc
* feature parity with django-rest-swagger 2