* Fix delete_last_n_records in tub.
* Pep-8: remove whitespace
* Add test.

* Update to CircuitPython OLED library

* Per code review

* Added the OLED library to Nano installation, too

Co-authored-by: Chris Anderson <gca2@earthlink.net>

Co-authored-by: Chris Anderson <gca2@earthlink.net>

As suggested by @DocGarbanzo. It works!

* - Update tensorflow version to 1.15.0
- Add doc for Jetpack 4.4
- Remove opencv installation

* Add dataset and pre-trained model page

* fix issue #634 (#646)

- remove jquery dependency
- add clearTimeout

* Allow overriding WEB_CONTROL_PORT from env variable

* pin h5py version

* fix h5py version for mac

* * Update doc with donkey train command. (#709)

* Update doc with developer section for building own models in donkey 4.1
* Integrate changes from PR feedback

* Donkey 4.x is now official (#723)

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

* change slack to discord on readme

* Donkeycar 4.x release.  (#644)

## 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.

* Improvements to the car app and handling of KerasPilot parts: (#648)

* Improvements to the car app and handling of KerasPilot parts:
*...

It was redundant to the DRIVE_TRAIN_TYPE and  CONTROLLER_TYPE options

* added virtual lidar support
* removed useless line

Small updates for RC Reveiver and Lidar

Combined lidar tests into single file and marked as skip, because it requires the necessary hardwar
Updated docs for RC receiver

Donkey UI: Add disclaimer and documentation for car connector screen

Kivy UI fixes