Implement HTMLMapElement.{areas,images} #1845
Description
Spec:
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-map-element.html#dom-map-areas
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-map-element.html#dom-map-images