Merge branch 'json' of ssh://gitlab.insa-rennes.fr:16022/francesco-bariatti/pingouins into json

Makefile

src/game/penguin.cpp

src/game/penguin.hpp

src/json/json-forwards.h

src/json/json.h

src/json/json.hpp

src/json/jsoncpp.cpp

tools/drawState.py

tools/gui.py