Add TGN tracker
Remove Sparvar tracker

They were shut down
Update DanishBits tracker

They moved to the Gazelle back-end.
Add explicit capture of season and episode to BTN

It now grabs the episode and/or season from the Title field in BTN's announce.
This should allow shows that don't have the expected information in the release name (mostly anime) to be matched by those filter options.
Change regex for Karagarga