Changed the IPTorrents show provider into a new season and episode provider, removed grouped cat_ids
Fixed refresh action - changed show searcher to bind to 'season' and 'episode' media types for '.searcher.single' as well.
Added related_libraries to Library model.
Related libraries are now merged into {<type>: [<library>,...]} type
related_libraries are now only included on searches and added the root_library attribute
searcher and matcher now uses the new related_libraries and root_library from media instead of using extra db queries
Moved 'searcher.get_media_identifier' into season and episode libraries as 'library.identifier'
Updated Caper to v0.2.3 and Logr to  v0.2.2 to greatly improve matching performance
Fixed incorrect reference to library 'season' and 'episode' attributes.
Merge pull request #2549 from fuzeman/tv_searcher

[TV] Searcher cleanup and matcher updates