* Update README.md

* Backporting minor doc fixes from the master branch (#2630)

* Replaced references to master with released in documentation (#2637)

* Replaced references to master with released in documentation

* Fixed CONTRIBUTING.md

* Update installation-procedure.md (#2638)

* Fixes documentation with respect to 3D mouse controls on Mac (#2642)

* Update the-3d-window.md

* Update webots-doc.css

* Update the-3d-window.md

* Update webots-doc.css

* Update the-3d-window.md

* Update the-3d-window.md

* Update the-3d-window.md

* Update bioloid.md

* Update samples-devices.md

* Update the-scene-tree.md

* Update tutorial-1-your-first-simulation-in-webots.md

* Update tutorial-2-modification-of-the-environment.md

* Update tutorial-2-modification-of-the-environment.md

* Update using-your-ide.md

* Update debugging-c-cpp-controllers.md

* Update matlab.md

* Update installation-procedure.md

* Update tutorial-1-your-first-simulation-in-webots.md

* Update tutorial-3-appearance.md

* Update tutorial-6-4-wheels-robot.md

* Update samples-howto.md

* Update the-3d-window.md

* Update keyboard.md

* Update docs/guide/debugging-c-cpp-controllers.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update docs/guide/matlab.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update docs/guide/tutorial-6-4-wheels-robot.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update docs/guide/the-scene-tree.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update tutorial-3-appearance.md

* Update docs/reference/keyboard.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update docs/guide/tutorial-3-appearance.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Update supervisor.md (#2646)

* Update supervisor.md

make the addForce description more clear, especially for Python users.

* Update docs/reference/supervisor.md

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

* Added "option key on Mac" instead of Alt key (#2652)

* Added "option key on Mac" instead of Alt key

* Update tutorial-1-your-first-simulation-in-webots.md

* Update tutorial-1-your-first-simulation-in-webots.md

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

* Update tutorial-1-your-first-simulation-in-webots.md (#2653)

The maximum speed is 2 rad per second. The velocity is set to 10% of MAX_SPEED. Therefore the wheels should rotate at 0.2 rads / s.

Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>
Co-authored-by: Simon Steinmann <52213164+Simon-Steinmann@users.noreply.github.com>
Co-authored-by: Nikolaus Correll <nikolaus.correll@colorado.edu>