demo showing the multi theming ability

see https://github.com/ibm-js/deliteful/issues/205
Thanks, this is fixed in commit https://github.com/sbrunot/deliteful/commit/64536b811af5f7a846f3b6cee4fc4eb977f9bbfa.

Notice how I have to use `arguments[0]` as a parameter to my event handlers. Is there a syntax that I can use to pass the function name so that it is called with the event automatically provided as its parameter ?