Add aight (version 1.1.1)

To quote upstream:
> Aight is a collection of shims and polyfills that get IE8 up to speed with a bare minimum of HTML5 compatibility, providing all of the interfaces necessary to do HTML-only DOM manipulation with d3.js (and other libraries that rely on those interfaces).

It also happens to be the recommended IE8 shim for getting at least partial functionality from d3.