App handler app render bug fix

As discussed with @markhealey I have updated the <code>F2.AppHandlers.__trigger()</code> method to use the apps outer most html node for the <code>appConfig.root</code> when container developer specifies <code>F2.AppHandlers.on( F2.AppHandlers.getToken(), 'appRender', document.getElementById('ANYTHING') );</code>

I added a unit test to validate that this is working as intended also rebuilt js, left docs alone.

Let me know if there is anything you guys need.