Updating bug in stateflow lesson

Fixing bug in object detector

Adding Clawbot Electromechanical model and accompanying lessons

Bug fixes in BEST Robotics game:

- Bug where distance sensor may not detect obstacles (trees) when set at random locations. 
- FPV camera not configured correctly in templates

Updates and bug fixes for BEST Robotics Virtual game 2021

Adding BEST Robotics Virtual Game for 2021 - DemoDaze.

Bugs and fixes

Update 1 to BEST Robotics Outbreak Online Game

Adding BEST Robotics Online Game for 2020

Updating readme

Updating physics and adding more human interface controls (Keyboard a…

…nd VEX V5 Gamepad).