For org.hornetq.utils.Base64

I am placing this code in the Public Domain. Do with it as you will.
This software comes with no guarantees or warranties but with
plenty of well-wishing instead!
Please visit <a href="http://iharder.net/base64">http://iharder.net/base64</a>
periodically to check for updates or to contribute improvements.

@author Robert Harder
@author rob@iharder.net