mfontanini

### Keybase proof

I hereby claim:

  * I am mfontanini on github.
  * I am mfontanini (https://keybase.io/mfontanini) on keybase.
  * I have a public key ASDjhwVOYzMLRHTqkdM7XnyWiFpJvfBm3ZgVkfjk1BsB4Ao

To claim this, I am signing this object:

mfontanini

// Base code taken from 
// https://github.com/mfontanini/Programs-Scripts/blob/master/constexpr_hashes/md5.h 
// and expanded to include a main function

#ifndef CONSTEXPR_HASH_MD5_H
#define CONSTEXPR_HASH_MD5_H

#include <array>
#include <iostream>
#include <cstdint>