This class provides encode/decode for RFC 2045 Base64 as defined by
RFC 2045, N. Freed and N. Borenstein. RFC 2045:
Multipurpose Internet Mail Extensions (MIME) Part One: Format of
Internet Message Bodies. Reference 1996
author: Jeffrey Rodriguez version: $Id: Base64.java,v 1.3 2006/08/31 09:28:27 val Exp $