Stubby card variation

![screen shot 2014-11-24 at 16 46 56](https://cloud.githubusercontent.com/assets/271645/5168786/bce9c338-73f9-11e4-8f56-f4a30aee7dca.png)

Ready for the A/B testing whether or not changing the the aspect ratio of the cards affects click-throughs (separate PR).