schedule.mss - must exist and be up to date
playlists - must exist and be up to date
download schedule and playlists to /tmp/
read schedule
read playlists that exist and mentioned in schedule
read all tracks from playlists [only *.mp3]
write all found tracks in sdb [/tmp/smart_db.dat]
show missing tracks
remove excess tracks
remove empty dirs
remove sdb [/tmp/smart_db.dat]
remove schedule+playlists [/tmp/]