Update for Robo HAT MM1 code.py

Updated Docs for Simulator (Part 1 - dev)

PR latest

Update comments for serial port.

Add simulator over USB commands

Add websocket to drive api

Allow data augmentation on tub outside of training

Restrict support to python 3.6 and 3.7

* Add image augmentation as a standalone Tub member function which replaces the images in place.
* Refactor the augmentation to separate into conversion between numpy arrays and PIL images and the augmentation functions
* Add a donkey command 'donkey tubaugment' to augment tubs in place or clone the tub into a now one with augmentation and keep the original.
* Add a test that checks the augmented data only differs slightly from the original images

Linked with previous commit.

Easier to swap between.

Linked with #576 .   No automatic way at the moment for picking the serial port when using USB_SERIAL for simulator control.  This will have to do.