Usage: hex_md5 ('String');
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/130/10066/Portable%20MD5%20Function.js
Origional source to the script / 原始脚本源码来源: http://pajhome.org.uk/crypt/md5/md5.html
Modified to make this portable / 进行了少许更改使其不会污染全局变量.
