Deliver complete event object, not just params

Each event is to be received at listeners as the complete, on which is available the name and event source URL:

SceneJS.node({ sid: "left-green-sphere",
    listeners: {
        "picked":{
            fn : function(event) {
                alert(this.getSID() + " handling '" + event.name + "' from " + event.uri);
            }
        }

    }
},