implementation of MD5 in pure JavaScript

 This module implement md5 on pure javascript for browserify.
 .
 The MD5 algorithm is a widely used hash function producing a 128-bit
 hash value. Although MD5 was initially designed to be used as a
 cryptographic hash function, it has been found to suffer from
 extensive vulnerabilities. It can still be used as a checksum to
 verify data integrity, but only against unintentional corruption.
 .
 Browserify is a JavaScript tool that allows developers to write
 Node.js-style modules that compile for use in the browser.
 .
 Node.js is an event-based server-side JavaScript engine.