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

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

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

Refactored how TheTVDB api handles exceptions and how those are passed on and handled inside SR core

Refactored core web session exception handling
Feature added that allows searching episodes by collection format
Refactored name parser match scoring
Refactored name parser regex placement for mvgroup
Refactored show search types into SearchFormats class
Refactored main db to v12 and added in code to migrate old-style show search options to new-style show search formats
Refactored core API web session exception handling
Refactored providers by removing archetorrent and elitetorrent
Fixed season folder show option, needs to be invested as it controls flattening of folders show option
Refactored requirements.txt, updated misc packages

Refactored search clients into classes for NZB and Torrents
Refactored web session core class to add 1s sleep during connection errors for retries
Refactored using IOLoop.current() to get main ioloop, reverted back to using core variable that calls IOLoop.current() once
Refactored add show options to include sports, dvdorder, subtitle metadata, and air-by-date options

Fixed There is no current event loop in thread 'POSTPROCESSORQUEUE-MANUAL' error, using AnyThreadEventLoopPolicy
Added thread locking to queue workers

Refactored usage of IOLoop by removing const io_loop from core and using IOLoop.current() calls instead

Refactored how logs view uses max lines
Refactored queue class to fire events using threads instead of ioloop
Refactored how scheduler jobs are forced to execute on request

Refactored code for adding new/existing shows, removed auto-detection of XEM scene numbering as it was falsely setting scene numbering to ON.

Added SR API endpoints for scene exception retrieval.
Added scene_exceptions and last_scene_exceptions_refresh properties to TVShow class.
Added retrieval of scene exceptions method to TVShow class.
Added get_scene_exception_by_name to TVShow class.
Added get_scene_exception_by_season to TVShow class.
Added update_scene_exceptions to TVShow class.
Fixed charmap issue with AniDB.

Fixed app lockup caused by improper handling of TheTVDB errors during image lookups when resource not found.
Re-enabled provider url grabbing from SR API, remove all calls to urls method from __init__ methods of provider classes.
Removed scene name cache, added function to search show cache by terms to retrieve series ID.
Refactored scene exception functions.
Added scheduler job to update scene exceptions once a day.
Tightened up display show view.

Refactored episodes attribute on TVShow objects to cache TVEpisode objects and persist.
Refactored usage and removed get_all_episodes method from TVShow class.
Refactored total show size to account for multipart-episodes.
Added delete_episode method to TVShow class to remove episode from shows episode cache.
Refactored usage of TVEpisode class method delete_episode to be called by TVShow method delete_episode instead of directly.
Fixed endpoint call for getting annoucements from SR API.

Fixed issue with syncing indexer data to database on full show updates.

Added more missing database session commits.

Moved TVShow model into MainDB init, created separate TVShow object that populates from TVShow model data.
Moved TVEpisode model into MainDB init, created separate TVEpisode object that populates from TVEpisode model data.
Override SQLAlchemy commit method with custom context method.
Removed database decorators, replaced with session variable inside functions.
Refactored TVShow and TVEpisode objects to proxy attribute requests to SQLAlchemy model object data.
Added any missing TVShow and TVEpisode database session commit calls.
Refactored TVEpisode <> TVShow episodes, imdb_info, and show relationships to object properties.

Fixed up more database session passing throughout application to help with 'database locked' exceptions

Increased max database commit attempts for "database is locked" exceptions to 50 with random sleep timer ranged 10 to 30 seconds each attempt.
Added rlock to context session class to help with "database is locked" exceptions.
Increased timeout for sqlite engine to 30s to help with "database is locked" exceptions.

Moved progressbar calculations for home view show cards to JS core.

quality if the episode file is placed back.