Importing http://bugs.musicbrainz.org/ticket/875

At the top of artist page (eg.)

http://test.musicbrainz.org/artist/847e8284-8582-4b0e-9c26-b042a4f49e57

Have different icons (Person/Group/Unknown) instead of: http://musicbrainz.org/static/images/entity/artist_lg.png