New About page

**Not for merging**

I've designed & implemented a new version of the About page - adding a number of requested features (updated mentions of investors, random order of team members, links to social networks for each member) and generally updating the visuals & interactions.

![gh-preview](https://cloud.githubusercontent.com/assets/883598/3413478/f41c17d4-fe0b-11e3-94ff-81b3d1611661.png)
 
I think you could do all of this in a simpler way. What if you have an `ng-show` attribute on the popover content and then toggle that on click. You can then do all of the animation in CSS.