Adds antialiasing in graphics settings.
Adds a custom font.
Adds LeanTween.
Numerous improvements.

- Adds real start and finish lines! Races begin and end!
- Tweaks off-camera respawning for players in last place. Still bad.
- Resets rudder/throttle on respawn.
- Adds UI text banners for race start/finish.
- Re-enables sink on finish.
- Adds game reset a few seconds after finish.