[new] ie8 lands in cdnjs [author] Andrea Giammarchi

As asked in [this filed issue](https://github.com/WebReflection/ie8/issues/9) the `ie8` gap-filler DOM3 polyfill [tested against W3C specs](http://webreflection.github.io/ie8/test/) is asking to land in this CDN.

Bear in mind if you see red tests is because your browser is not probably respecting W3C standards but IE8 will show all green lines.

Thanks for considering this.