* 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
* replace media items tables with card grids
* style cleanup
* add basic paging
* sort and page in the db
* optimize sql for movies
* support movie posters
* resize movie posters and store in cache with channel logos
* fix bug preventing folders with more than 50 chars as local media sources
* support tv posters
