flac2mp3: use the basename of the flacBaseDir as root under mp3BaseDir

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Syncer: use a linebreak in a generated command

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Syncer: only print 'Copying covers' when actually copying

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
flac2mp3: release updated bundles and remove old bundles

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>