Added XBMC collection (set) categorization capability.

couchpotato/core/providers/info/themoviedb/main.py

@@ -121,6 +121,7 @@ class TheMovieDb(MovieProvider):
                 'year': year,
                 'plot': movie.overview,
                 'genres': genres,
+                'collection': movie.collection.name,
             }
 
             movie_data = dict((k, v) for k, v in movie_data.iteritems() if v)