* initial plumbing
* scan for plex networks
* save network contents to db as tags
* eliminate network tag id churn
* add network and show_network to search index
* update last networks scan
* show networks on tv show page
* update changelog
* wip
* first pass at elasticsearch; movies kind of work
* use field name constants
* properly sort search results
* fix some crashes
* fix page map/jump letters
* optimize page map using terms aggregation
* index all item types
* optionally use elastic search
* code cleanup
* automatically rebuild lucene index after improper shutdown
* update changelog