Lookup for movies/series ratings on trakt

Query trakt.tv for series and/or movies rated by the user. Set the
fields trakt_rating (love|hate) and trakt_rating_advanced (1..10) if the
user has actually rated the movie/show on trakt. Uses several fields
from metainfo plugins (series_name, tvdb_id or imdb_id for series,
title, tmdb_id or imdb_id for movies).