Converting to Django REST Framework and moving V1 API to /api/1

I'm opening this pull request before it is ready to merge because testing is required.

The primary Roundware Operations API has been moved to /api/1
The TastyPie REST API is at it's old location /roundware/api/v1
The new RDF REST API is at /api/1/rest. There's even a web UI for it: http://localhost:8888/api/1/rest/

Theoretically very little should of the Asset Map JS code should need to be changed, but I haven't touched it yet.

A final commit will remove all TastyPie related code either in this pull request or ASAP at a later date.