Jump Button 1.32

Big thanks to Olrosse who provided a great solution for jump consistency.
Changes:

• Jump direction relative to car angle: Jump angle will always be relative to car angle. This means you can now jump towards the ground.

Fixes:

• Jump height now consistent: Changing the method of making the car jump has fixed this bug.
• Default key is now U: It wasn't Y like the description said, and there is a conflict on Y. U has no conflicts as far as I can tell.