Continued writing multithreaded code

* Moved all files for multithreaded stuff to their own folder within test
* Replaced arduinoI and arduinoO with arduino IO because I don't know if the arduino library is thread-safe
* Coded arduinoIO and imageProcessing

TODO:
* Code basic control logic
* Code the corresponding navigation logic
* Create a runner (that starts and stops all threads)
* Test -- code should execute with the same functionality as non-multithreaded code
* Write more advanced control logic
* ???
* Profit