----bug

-----To add
*COMPILATION
    Should be set to 1 if the album is a compilation.

*LIVE
    Should be set to 1 if the track is a live performance.

-----Singletons
Singletonst tags, which should only appear once. If one of these tags
appears more than once, its last appearance should be displayed if there
is only room to display one instance of the tag.

ALBUM
*AKA
ARTIST
PUBLISHER
*COMPILATION
*COLLECTION
COPYRIGHT
ISRC
*EDITION
EAN/UPN
*KEY
LABEL
LABELNO
LICENSE
OPUS
SOURCEMEDIA
TITLE
TRACKNUMBER
VERSION
*VOLUME
ENCODED-BY
ENCODING
CDDB

---Multiple tags
The remaining tags are multiples; if they are present more than once,
all their occurances are considered significant.

COMPOSER
ARRANGER
LYRICIST
AUTHOR
CONDUCTOR
PERFORMER
ENSEMBLE
PART
*PARTNUMBER
GENRE
*DATE
LOCATION
COMMENT