When creating paths for compilation albums with multiple discs create
all discs directories. The same criteria used when moving/copying
single-artist's albums with multiple discs.
When moving files to the Music Library directory, if the album has
multiple discs, inside the album folder separate tracks inside the
corresponding disc directory and re-number the tracks per disc.
When listing items, the default sort ordering doesn't work well with
compilations because the artist is not the same for all the items inside
the album. Therefore, to correct that the new default uses the
album-artist instead of the artist as the first ordering key.
In order to keep files' state, to manually control the renaming or
writing of tags, during the import stage do not copy files nor write the
tags downloaded from MusicBrainz.
In Beets' compilation path use the album-artist to store the album
instead of separating all the compilations to their own directory. Most
albums will be equally stored under the "Various Artists" album-artist,
but many will be distinguished stored under the correct album
orchestrator.
