implemented basic visualiser

CMakeLists.txt

msg/State.msg

msg/States.msg

nodes/visualiser

setup.py

src/visualising/animation.py

src/visualising/animations/__init__.py

src/visualising/animations/animation_happy.txt

src/visualising/animations/animation_ok.txt

src/visualising/animations/animation_sad.txt

src/visualising/arduino.py

src/visualising/connection.py

src/visualising/exception.py

src/visualising/visualiser.py