Scripts to build and launch programs + minor fixes

sh ./robot.sh build, load and run the RemoteControl program on the NXT brick Daneel
sh ./computer does the same for the computer program
New listener for protobuf message. New Tank class to handle everything related to a tank (BT connection included)

Create a receiver in the Proxy listening to messages incoming from the server.
New tests added for protobuf use cases.
Add TankControl class, a program better suited for our prototype