Libc

This part is about some standard Libc functions.

The functions are grouped by the header file which the original function is present:

ctype.h	string.h	strings.h	stdlib.h
ft_isalpha	ft_strlen	ft_bzero	ft_atoi
ft_isdigit	ft_memset		ft_calloc
ft_isalnum	ft_memcpy
ft_isascii	ft_memmove
ft_isprint	ft_strlcpy
ft_toupper	ft_strlcat
ft_tolower	ft_strchr
	ft_strrchr
	ft_strncmp
	ft_memchr
	ft_memcmp
	ft_strnstr
	ft_strdup