Allow for querying tags and user-tags from releases.

Signed-off-by: Jérémie Detrey <Jeremie.Detrey@loria.fr>
Merge branch 'master' of https://github.com/jdetrey/python-musicbrainzngs

Signed-off-by: Wieland Hoffmann <themineo@gmail.com>
Add a CHANGES entry for tags/user-tags on releases

Signed-off-by: Wieland Hoffmann <themineo@gmail.com>