Add authentication API backend and database

[bubthegreat]

Ideally this will flesh out the stack to something that's borderline useful for those who want to put together a real stack that requires authentication.

Requirements:

• sqlalchemy ORM implementation for database compatibility
• redis auth token tracking
• API endpoint for authentication
• Frontend login that leverages all of the above
• Frontend user creation screen
• Frontend ability to remove users

This is a longer term portion of the project that I'll need to work on for specific examples anyway, so ideally I'll be able to genericize it once I've gone through the practical implementation, but I would appreciate help from those who are already in the know on the authentication side.