Use theme dependent drawable for 0 star in overview.
Always get latest tmdb config, even if no show was updated.

Still restricted to non-SINGLE update types.
Validate credentials against trakt server when updating.

Will reset them, if they are deemed wrong by the trakt server to force
the user to enter them again.
Better trakt failure message.
Updated translations to remove old trakt error message.
Merge branch 'check-trakt-credentials' into beta
Merge remote-tracking branch 'upstream/beta' into beta