First release
	Play track
		Cause
			menu command (play next)
			menu command (skip to next)
			back to last track
		track assignments (modify for "back to last track")
			✓ last = current
			✓ current = next
			✓ next = None
		other
			✓ update last / current / next track display
			timers to new current
			update start time for remaining tracks
			show track as played
			if playing, fade current over 1 second
			Log tracks played
	During playback
		✓ Update timers
		Update time colours
		Status bar Total remaining playlist time
		Stop
		Fade
	Playlist management
		Automatically save playlist
		Automatically load playlist
		Add track to database and playlist
		Reorder playlist
		Remove track
		✓ Add track
		Clear playlist
		Clear selection
		Click current does not change next
	Display
		✓ Remember window size
		✓ Remember dialog size
		✓ Remember playlist column sizes
		✓ Timer font less bold
		Make elapsed time and end time correct when track ends
		Select next track if not already selected on track end
		✓ Top: previous, current, next track
	Buttons
		Play next
		Skip to next
		Fade
		Stop
		Fix icons in toolbar
	Misc
		✓ Logging
		✓ Preferences
		Database check for new/missing
		Database check mtimes as well
		✓ Move clocks to bottom
		Status bar
		Timer colour warnings
		Non-track playlist entries
		Fade entry for some tracks is zero
Later releases
	Autoplay next track
	Track properties
	Copy track
	Paste track
	Track volume analysis
	Open track in Audacity
	Wikipedia for song title
	Song facts for song title
	Named playlists
	Song lookup as RompR
	Visualise track volume
	Script notes
	Higher precision timer for some things (RTC)