Printf project

`(Function _printf)` A project that consist in the recreation of the printf function.

The function _printf will look for the elements according to the protoype.
The function _printf will return the lenght of the input or -1 if wrong input.
The file select_printer.c contain the structure for the format specifiers.
It is included the prototipe of the functions in the holberton.h file.

File	Description
`_printf.c`	Prints according to an specified format
`print_char.c`	Contains function that prints a char
`print_string.c`	Contain function that prints string
`print_int.c`	Contain function that prints a string
`print_double.c`	Contain function that prints a double
`print_octal.c`	Contain function that converts a number to octal
`print_hexa.c`	Contain function that converts a number to hexadecimal
`print_mini_hexa.c`	Contain function that converts a number to hexadecimal (lowcase)
`print_binary.c`	Contain function that converts a number to binary
`print_reverse.c`	Contain function that reverse a string
`print_rot13.c`	Contain function that converts to rot13 (work in progress)
`print_unsigned_int.c`	Contain function that handles unsigned int
`print_special.c`	Contain function that handles % format
`select_printer.c`	Contain function that contains a structure for the formats
`holberton.h`	header file