+ check for the real current track in NextTrack and PrevTrack before using
  the value because the player might be somewhere else
+ the pause flag logic belong to TCDPlayer instead of TMainWindow
+ display "#-- --:--" when there's no disc, the total number of
  tracks and length in minutes and seconds when there's a disc which
  isn't playing
- the index is missing
- can't handle non audio discs
- doesn't detect disc change
+ doesn't detect a running disc on startup
- doesn't use CDDB informations
- total running time is still missing in `stopped' mode
+ bitmaps should be stored as PNG files
+ bitmaps should be stored in TOAD memory file system
+ TOADs memory file system must be implemented
