Add support for filtering events

[ghost]

I am trying to implement an event handler on the body element that is targeted to sub-elements with a selector. In the below example, the click handler works because jQuery allows you to filter for child elements on the click handler, but the handler for hammer does not.

$("body").on("click", "[data-evo-overlay-toggle]", toggleOverlay );
$("body").hammer().on("swiperight", "[data-evo-overlay-swiperight]", toggleOverlay);

It would be nice to have support for filtering.