Correct assignment of root for subcomponents for NWheeledCar
issue #13 (closed), #11 (closed) , #7 (closed)
The root was assigned to SimpleRectBeam, ESP32Stack, and NWheeledCar, such that the z-axis point to what would be the front of the car. The root for the car is the orientation of brains (ESP32Stack) and it's orientation is controlled by the orientation of SimpleRectBeam