Ajout script
	new file:   jeu_echec/bin/lancer_jeu.sh
	modified:   jeu_echec/script/lib.sh
	deleted:    README~
	deleted:    jeu_echec/bin/jeu_echec
	deleted:    jeu_echec/script/lib.sh~
	deleted:    jeu_echec/src/makefile~
	deleted:    visualiseur_2d/visualiseur_linux