musicbrainz/picard — pull request #106 by Sophist-UK (2013-06-03 06:55:17+00:00)
Title: Handle Performer tags stored in ID3v2.3

Performer tags are stored as part of the IPLS tag in ID3v2.3 and this is
put into the TIPL tag when read by mutagen. This fix adds unknown TIPL
roles as Performer tags.