ajoute README.md dans makefile

makefile

@@ -16,8 +16,8 @@ player.o: player.c grid.h player.h
 clean:
 	rm -r *.o main html *.gz
 
-doxy:
+doc:
 	doxygen
 
 archive:
-	tar -cf sokoban.tar.gz Doxyfile grid.c grid.h level1.txt main.c makefile player.c player.h
\ No newline at end of file
+	tar -cf sokoban.tar.gz Doxyfile grid.c grid.h level1.txt main.c makefile player.c player.h README.md
\ No newline at end of file