Implement simple dajaxice method call.

Use dajaxice to perform a very simple task: when a certain button is clicked,
fetch a message from the server and display it as an alert box. This is a proof
of concept that dajaxice works.
Try to call python function with an arg

Unfortunately, it fails. I don't really know why, either, as the error appears
to lie within the dajaxice-generated JavaScript.