Bumped main database version to 13
Added scene option throughout SiCKRAGE
Added lock to queue worker, acquire and release lock when notifying workers
Fixed issue with removing episode from show episode cache
Removed QuickSearch cache class and database tables, using data to populate quicksearch entries from main database instead

Fixed #SICKRAGE-APP-5DW - Error while searching GKTorrent, skipping: 'NoneType' object has no attribute 'text'

Refactored Tornado IOLoop integration

Refactored search, show, and post-processor task action enums

Fixed dict changed size error for queue tasks

Fixed issues with manual searches and search status updates
Misc function renames

Added option to enable/disable converting of magnet links to `.torrent` files, torrents will automatically be saved as `.magnet` files if this option is disabled or SiCKRAGE is unable to convert the magnet link to a `.torrent` file when using blackhole as a torrent client option.

Removed line of code that was left by mistake in show update function
Added thread lock for quicksearch updates

Refactored queue system to use built-in queue classes instead of Tornado's queue classes

Removed requirements of needing url to be magnet for adding/retrieving to/from SR API provider cache
Fixed decode issue for is_ip_private helper function