Add formidable labs section.

Still a WIP, but:

* Add blurb about formidable labs.
* Add some formidable logos (not sure where they go exactly).

I'm very interested in feedback on:

* **Language**: How does the formidable blurb read?
* **Location**: Is this the right place on the page?
* **Logo**: I've thrown up something that looks like the attached screenshot. We *also* have the text b&w formidable SVG logo in this branch too. I'm not sure what looks best. @alexlande ?

![screen shot 2014-05-21 at 4 06 49 pm](https://cloud.githubusercontent.com/assets/445557/3047889/d48aa8cc-e13c-11e3-8531-bc83d4448f64.png)

/cc @autumnbottom @eastridge @alexlande