Fix bad rating calculation

iTunesParser.py

@@ -219,6 +219,7 @@ class ITunesParser:
         file_artist = io.open('es-artist-data.json', 'wb')
         for artist in self._artists:
             persistent_id = self._artists[artist]['Persistent ID']
+            self._artists[artist]['Rating'] = round(self._artists[artist]['Rating'])
             json_track_index = {
                 "index": {"_index": "itunessongs", "_type": "artist", "_id": persistent_id}
             }
@@ -236,6 +237,7 @@ class ITunesParser:
         file_albums = io.open('es-albums-data.json', 'wb')
         for album in self._albums:
             persistent_id = self._albums[album]['Persistent ID']
+            self._albums[album]['Rating'] = round(self._albums[album]['Rating'])
             json_track_index = {
                 "index": {"_index": "itunessongs", "_type": "album", "_id": persistent_id}
             }
@@ -250,7 +252,7 @@ class ITunesParser:
         """
             Calculate average rating from a current rating, a rating value to add and the number of elements
         """
-        return (current_rating * count + added_value) // (count + 1)
+        return (current_rating * count + added_value) / (count + 1)
 
     @classmethod
     def calc_id(cls, key):