[Feature] On-board terminal

[Gregwar]

We wrote a terminal that runs on-board and allows us to interract with the board on run-time easily:
https://github.com/RobotsWar/RobotsWar/blob/master/LibRobotCampus/terminal.h
https://github.com/RobotsWar/RobotsWar/blob/master/LibRobotCampus/terminal.cpp

I know this is more a third-party library, but it is really handy to do some tests.

If you want to give it a try, you can simply clone this:
https://github.com/RobotsWar/Maple/

Go to "skeleton", and then make & make install (it defaults to maple_mini)

Maybe this could be part of libmaple