Added vereshchagintest-youbot-motion-matlab-marieke.cpp.

Differences from original vereshchagintest-youbot-motion-matlab.cpp
- MPC strategy
- Logging to textfiles instead of terminal (needs to be changed)
Modified vereshchagintest-youbot-motion-matlab.cpp
- MPC approach
- Logging in text files needs to be changed
added src/vereshchagintest-youbot-motion-matlab-marieke.cpp