Geography tiles

Review/merge #97 first.

Design: https://projects.invisionapp.com/d/main#/console/1392015/31133496/preview

Screenshot
![screen shot 2014-09-15 at 3 46 26 pm](https://cloud.githubusercontent.com/assets/910510/4278150/64b04d7e-3d15-11e4-8bb7-a8b2d7758182.png)

Screenshot (without truncation)
![screen shot 2014-09-15 at 3 32 51 pm](https://cloud.githubusercontent.com/assets/910510/4278152/6d860998-3d15-11e4-9569-f9faf3eac6a7.png)

Question for @marcotuts: What are your thoughts on truncation? The unequal heights can be fixed CSS/JS, but it may be difficult (e.g. another couple hours of work). Thoughts on this?

@dsjen @rocha @marcotuts @shnayder