Removed radvar table usage

- Cleanup of DJ class, this was the heaviest user of radvar
- DJ class got several bugs fixed
- DJ class got its code cleaned up and made readable
- .gitignore added for good measurement (totally unrelated!)
Added requestcount increment to irc handlers
Changed .dj logic to properly give error messages
Implemented new queue in requests and manager

- Replaces Queue code in manager.py with dummies from `radio.queue` package
- Cleans up requests server code, fixed several shitty code examples