Better way to load Behaviors

[roperzh]

Currently if you change some contents in the page ( loaded via AJAX for instance ) there is no semantic way to initialize the behaviors attached to the new contents, one way could be doing something like this:

Essential.rootElement = elWithNewContents;

Essential.start(App);

The idea is provide a method to load new contents, which can accept a custom domElement for instance:

Essential.loadBehaviors(App, elWithNewContents);

Ideally Essential.start would be using this method