Tagger: vorbis_to_tags: added support for multiple values per tag (except dics/track number and date)
Tagger: vorbis<->other: added performer support (only ID3)
Merge branches 'tagger/non_vorbis_tags' and 'tagger/multiple_values_per_tag'

* tagger/non_vorbis_tags:
  Tagger: vorbis<->other: added performer support (only ID3)

* tagger/multiple_values_per_tag:
  Tagger: vorbis_to_tags: added support for multiple values per tag (except dics/track number and date)
Tagger: vorbis<->other: added performer support (only ID3)
Merge branch 'tagger/multiple_values_per_tag' into tagger/non_vorbis_tags

* tagger/multiple_values_per_tag:
  Tagger: vorbis_to_tags: added support for multiple values per tag (except dics/track number and date)

Conflicts:
	tagger.py
Merge branch 'tagger/non_vorbis_tags'

* tagger/non_vorbis_tags:
  Tagger: vorbis<->other: added performer support (only ID3)