Rename luokittelija in subscriber management filters
Distinguish different types of TV search filters
program-box rendering: Differentiate between program vs. classification code
program-box: Show a different classification html for tv-series'
Force season and episode fields to be numbers

* Also, only parse them in XML-import when the programType == tvEpisode
* Also, make linkTvSeries a bit faster by preloading tvSeriesNames
Rename utils.asDate -> utils.asDateTime
Add a real utils.asDate
Support optionally-authenticated-http-handlers

Whether the user is authenticated is determined by the existence of req.user.
Combined /public/search/ and /programs/search --> /programs/search
Basics for showing episode list and episode details under a tv-series
Use sequenceId in complaint-email