* Use artist-credit->name
Use artist-credit->name, if it exists. Otherwise use artist-credit->artist->name.
* Add test case
* Fix for PEP8
* transform comment to docstring
* reject 'recording artist name' in favour of 'release artist name'
* reject 'recording artist name' in favour of 'release artist name'
Make MusicBrainz consistently written as "MusicBrainz" and not
"musicbrainz" or "Musicbrainz".
Doesn't change instances that refer to the Python module or similar.