* Improvements to the car app and handling of KerasPilot parts:
* Created a simpler webserver or joystick car app by modifying and renaming the basic_web into basic template and switched this on as default. Also renamed the target from 'manage.py' to 'drive.py' because there is only driving and no training included
* Simplified the handling of uint8 and float32 numpy image arrays. KerasPilot.run() now expects uint8 data, transforms into float32 and delegates to its children. The corresponding rescaling step is gone from the car app
* smaller updates/fixes to environment and config files
* added support for tflite pilots in makemovie

* Improvements to the car app and handling of KerasPilot parts:
* Added docstring to KerasPilot methods
* Fixed bad merge for model types in complete config

## Major Improvements

- New Datastore.
- More ways to pre-process image data for training. 
- Use the 2.x version of Tensorflow. 
- Lots of other minor improvements. 

Update simulator.md

Update simulator.md

Fix typo 'catagorical'

Update create_application.md for MM1 parameters

change slack to discord on readme

Update nano install docs - python3-opencv vs libopencv-python

correct spelling error.

Update README.md

Just wording - Slack is deprecated, Discord server is now official communication channel.

Add missing two parameters related to RoboHat MM1.

See comments in #616

Added Hackster IO Links
Changed the link for the code.py to internal Donkey Car maintained version.

Co-authored-by: Tawn Kramer <tawnkramer@gmail.com>

joystic -> joystick

* consolidating config

* add default racer bio config to template

* multi_train changes

* Add rearlight support to mm1 circuitpython

* Add more validation on incoming calibration value

* Add stop sign detection

Co-authored-by: Jonathan Tse <jtse@proactivesystem.com.hk>

Add mobile app user guide