Add some readme files, start fixing docker build.

Docker (and CI in general) build currently isn't generating protobuf files.
Docker image also needs to check that pigpio works.

pycar/src/car/control/gpio/vehicle.py

@@ -31,7 +31,7 @@ def _is_pin_valid(pin):
 
 class Vehicle:
     def __init__(self, motor_pin=19, servo_pin=18):
-        subprocess.call(['sudo', 'pigpiod'])
+        subprocess.call(['pigpiod'])
         Device.pin_factory = PiGPIOFactory()
         print('Using pin factory:')
         print(Device.pin_factory)