Adding an ajax example for Gmap3 component (+ showing problem)

The GMap3 component doesn't load correctly when used in combination with ajax.
The call to http://maps.googleapis.com/maps/api/js?sensor=false&amp;callback=initialize causes an error as the function 'initialize' doesn't exist.

When you remove this in the GMap component the call to

this.coder = new google.maps.Geocoder(); in wicket-gmap.js fails as gmap api file isn't loaded (yet) when this is called.

I've created an simple Ajax example inside the gmap3-examples demonstrating issue: https://github.com/wicketstuff/core/issues/185