CHANGELOG:
- vehicles now look ahead several steps and try to swerve smoothly
- paint can now be sprayed on water
- added sounds
- vehicle selection and driving are now separate modes (PILOT and PILOT_DRIVE respectively)
- vehicles can now be deselected via grab in PILOT mode
- vehicles now try to reverse for a bit instead of constantly switching between reverse and throttle when parallel to a path
- all paint can now be erased at once by crouching while erasing