Fixed a issue where a album was marked as non downloadable, while it is
 * fixed assemlby versioning
 * fixed tagging:
    + ALBUMARTIST now supported
    + COMMENT field added along with a Qabuze branding
 + added version display

Signed-off-by: Hendrik 'Xendo' Meyer <butterkekstorte@users.noreply.github.com>
Merge branch 'master' of git@github.com:butterkekstorte/Qabuze.git