Finishing up homepage revamp

Following #659.

Might need some tweaks in the *real data* scenario.

Two tests are failing :worried: I don't think I touched those pages and also master is green. Help? Also I added some new copy that are 99% placeholder, better suggestion welcome.

![image](https://cloud.githubusercontent.com/assets/1153134/5236780/8781d7c2-7803-11e4-8ce2-f3f53d921ef3.png)

cc @andrew