Changed speed for relative value.

Changing inputs for better model training.

Changed attributes to:

1. speed
2. distance
3. position (x, y, z)
4. input_steer
5. input gas pedal
6. input brake
7. acceleration
8. jerk
9. rpm
10. aim yaw
11. aim pitch
12. steer angle
13. slip coefficient (front left and right wheel)
14. crashed (boolean, based on jerk value)
15. current gear
16. current checkpoint number
17. current lap Every value is converted to float. Some of the previous data were periodic or highly correlated with other attributes, which made training a neural network much harder.

Changed variables order, cleaned code and removed unnecessary print statements.