1.) Build the project:
lein cljsbuild once

2.) Open index.html in your browser.

To use Austin:
1.) lein repl
2.) (cemerick.austin.repls/exec)
3.) Check with eg.: 
    a) (.-userAgent js/navigator)
    b) (ns foo (:require [goog.net.Jsonp]))
       (.send (goog.net.Jsonp.) "http://jsfiddle.net/echo/jsonp/" (fn [event] (println event)))
