jshint/jshint — pull request #580 by zpao (2012-07-11 21:06:22+00:00)
Title: Add MutationObserver support

MutationObserver is a new [DOM 4 API](http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#mutation-observers) implemented in Firefox 14

The [MDN page](https://developer.mozilla.org/en/DOM/DOM_Mutation_Observers) isn't super valuable

This addresses #579