added first effort at creating an encrypted token to replace WidgetInstance as a means of storing and communicating information about a widget, in a similar wy to Apache Shindig. This code isn't integrated into the rest of the server, but serves as a first step for checking the model and testing encryption and decryption

git-svn-id: https://svn.apache.org/repos/asf/wookie/trunk@1564424 13f79535-47bb-0310-9956-ffa450edef68