* Add __exit__ handlers again.
* Use `os.linesep` to deal with line separators consistently.

* Train still prompts you to move to then new entry point.
* Also fixes https://github.com/autorope/donkeycar/issues/655

* added example tub data as tar.gz in tests with 1000 records
* check validation data size in train
* created new test_train.py
* added support for read-only tub, required to create r/o tub in tmp dir
* changed loss in categorical model to equally weight throttle and steering
* changed mod on scripts to u+x

* Update setup.py

* Update setup.py

Made changes online.

Add configuration to allow creating sub directories for each tub (like the legacy tub) or by default store all recordings in the data directory directly. (#649)

* 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