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

* 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