New About content

Adding correct about us copy, and putting in a large team image. This team image is a placeholder until we can get a hyperlapse/gif of people on the bleachers. However, it's okay if we launch with this image

Pls review/merge @jamesshedden 

![image](https://cloud.githubusercontent.com/assets/1246990/4612928/5fc9cb1c-52cf-11e4-97c8-e19cdb0d12b0.png)

Don't need double `--` here, maybe just `page-hero--team`