Lab 10: Driving With Acceleration
    
       - Lets change the game so that it has acceleration.
 
       - Add a velocity vector. Initially this is zero.
 
       - Add an acceleration vector also initially zero.
 
       - Make velocity change position. (4 points)
 
       - Change the up and down from movement to acceleration.(1 point)
 
       - Make acceleration change velocity. (1 point)
 
       - Make it stop when it runs off the track.(2 points)
 
       - Try to integrate traction. First try constant
           deceleration, (1 point) 
 
       - then try friction (I got it working with constant
           deceleration). (1 point)