FAQ Info Modal

Because people have been asking exactly what the seals that they can use are, why not have a little modal? Especially since we've quietly added two beyond the CR/QA seals.

This adds a link in the ```filters``` dropdown in the nav bar that will pop the modal. I was going to use a cute little Glyphicon in the navbar instead, but I couldn't find one that looked good enough and they like to float themselves all over the place it would seem. So there's that.

Here's what it's gon look like:
![FAQ Modal](https://f.cloud.github.com/assets/1192362/822768/61ac6098-eff7-11e2-8260-806672c21060.png)