Movies/Shows: display certification/content rating

[UweTrottmann]

Issue: only included in release dates response (which has ALL release dates...).

Maybe add separate release dates view + certification? Or choose one based on selected language+country combination. Though need to make sure it matches the shown release date. Possible issue with multiple releases (if they end up having different certifications).

http://seriesguide.uservoice.com/forums/189742-ideas-and-suggestions/suggestions/34538803-include-certification-age-restriction-for-movies https://developers.themoviedb.org/3/movies/get-movie-release-dates https://developers.themoviedb.org/3/movies/get-movie-details