* start to add multi-collections
* create multi collection with no items
* edit multi collections
* fix plex credentials threading issue
* add playback order to multi collection items
* group episodes outside of shuffled enumerator
* move playback order onto each schedule item
* fix multi collection grouping
* update changelog
* add explicit warning for zero/invalid duration media items
* set dateadded on plex media versions
* add media stream table
* save local media streams to db
* save plex media streams to db
* add preferred language settings (no validation)
* use preferred language if possible
* code cleanup
* proper language code validation
* force scan of all libraries to pull in media streams
* add letter bar with no links
* use lucene for search, add paged search results
* add search index version
* index library_name; rebuild index when folder is missing
* maintain index as local movies change
* fix tests
* maintain index as local shows change
* maintain index as plex movies change
* maintain index as plex shows change
* code cleanup
* add duplicate filter to search
* add links to letter bar
* code cleanup
