Adding IE6 Support

I think it's important for the site to function correctly on IE6, seeing as people with outdated browsers are the target audience for the site.

At present the CSS and webfonts are only applied to IE7 and above, so IE6 users see a broken site (see screenshot: http://www.screencast.com/t/8J5XZXcabc).

Also, the HTML5 Boilerplate is sending IE6 users to Browse Happy, so the site has quite a wide reach.

It also seemed as though this repo was out-of-date with the live site so I did my best to fold in the changes I could see.

Thanks,
Anna