Remove Agate/Data Fonts

Removing Agate, as it was too similar to Text Sans to justify itself. The biggest change was to tables that now look like...

![screen shot 2014-09-24 at 17 39 18](https://cloud.githubusercontent.com/assets/1607666/4391956/d32e1812-4409-11e4-85ee-c664436a1ea0.png)