#32 Create HuffmanEncoder class for aliases

[Adam Lancaster]

The connection aliases need to have an encoder so that
the encrypted passwords can be stored in the
connections xml file. This has initially been done using
the apache soap Base64 utility.

We need a utility class that can do the Huffman
encoding and return both the encoded binary data as
well as the inverse map needed to decode it.

There is a good example on how to do Huffman
encoding here:

http://www.javaworld.com/javaworld/javatips/jw-
javatip117.html?tip