Updating xml encryption library to latest.

Adds some additional authorization and logout encryption and decryption
algorithms.
Add method to create custom request XML

Rather than have a lot of params to control how the request is built,
let the caller supply callbacks to create the XML request to their
liking.
Fixed some typos.

Fixed some typos.
Too many closing tags in auth request.
Dolling up the readme.
Rename package

.. to avoid conflict and to make it easy to identify.