Merge branch 'master' of https://github.com/Maxipanda/N-Six into Robin
Merge branch 'master' of https://github.com/Maxipanda/N-Six into Robin
Game.js : initialisation du canvas / GameScreen.js : LevelScreen implémente les backgrounds / GameEntity.js : implémentation de InfiniteBackground
Merge branch 'master' of https://github.com/Maxipanda/N-Six into Robin

Conflicts:
	js/GameScreen.js
Merge Robin
Changements...
Merge branch 'master' of https://github.com/Maxipanda/N-Six into Robin

Conflicts:
	js/GameEntity.js
	js/GameScreen.js
Merge branch 'master' of https://github.com/Maxipanda/N-Six into Robin

Conflicts:
	js/GameEntity.js
	js/GameScreen.js
Background qui défile fonctionnel
Merge branch 'christophe'
Ajout de la gestion des fichiers audios et fonction d'initialisation des assets
Merge branch 'master' of https://github.com/Maxipanda/N-Six into christophe