merge
alias color
leaks del
leaks --
Merge branch 'master' of https://github.com/hadrienestela/42sh

Fixed conflicts:
	Makefile
	inc/42sh.h
	libft/libft.h
	src/alias.c
	src/cd.c
	src/execute.c
	src/history.c
	src/init.c
	src/signal.c