Fix agelimit/warning search for tv-series

Turns out agelimit or warning filters caused nothing to be returned for tv-series. Fixing by denormalizing the agelimit+warnings into progran.episodes for tv-series, and extending the search query creation to filter on those as well. The query creation is getting a bit complex.
Registrationdate search clear X had disappeared somewhere
Merge pull request #62 from kavi-fi/search-fixes

Search fixes