Gros refactoring, c'est plus propre, plus simple, plus mieux en gros ;)

	modified:   .gitignore
	modified:   def.h
	modified:   initialisation.c
	deleted:    initialisation.h
	modified:   input.c
	deleted:    input.h
	modified:   main.c
	deleted:    main.h
	modified:   physique.c
	new file:   player.c
	renamed:    physique.h -> player.h
	new file:   prototypes.h
	modified:   structures.h