Robo HAT MM1 (Official Support) - Peter v3.1.1

fix cmake build directory error

add support for tf version 2

Patch 3

448 protected DriveMode from None throttle or steering

493 updated rpi install docs to use buster

removed self arg from map_frange and moved map_frange to utils

add configs for PiCamera arguments: vflip & hflip

Update setup_mac.md

tf version 2 does not have the from_keras_model_file function so it must be explicitly loaded and the converter object created.

Following similar template / style to the latest donkeycar

Bring Robotics Masters Donkey Car up to date with latest changes.  Merging in AutoRope Donkey Car Repository