Some compatibility fixes for the lastfm plugin, and probably others. (The changes were unintentional.)

picard/album.py

@@ -421,3 +421,6 @@ class NatAlbum(Album):
             for file in track.linked_files:
                 track.update_file_metadata(file)
         super(NatAlbum, self).update(update_tracks)
+
+    def _finalize_loading(self, error):
+        self.update()

picard/track.py

@@ -156,7 +156,7 @@ class Track(DataObject):
 
         # Track metadata plugins
         try:
-            run_track_metadata_processors(self, tm, release, node)
+            run_track_metadata_processors(self.album, tm, release, node)
         except:
             self.log.error(traceback.format_exc())