Version 4

- Finish reimplementing sounds using PyGame.mixer.
- Add score recording.
- Add scrolling score history screen.
- Optimize framerate.
  - Remove Cairo in score display.
- Fix journal resuming in edit mode.
- Release Bounce v4.

Version 5

+ Add video paddle.
+ Add multiplayer.

Future

+ Double buffer only when text is visible onscreen.
+ Completely eliminate cairo.