Raffle Gadget for Google Wave.

The idea for this gadget is to select a random wave participant as a winner for a raffle.

We have a few variations of raffly, either an all client based one that you add as a gadget or an app engine backed version that you add as a robot.

off of /trunk

- java is obviously the java app engine version

- raffly-xml is one that was modified from the Click Me gadget ( http://wave-samples-gallery.appspot.com/about_app?app_id=5009 )