Use TextSans instead of Agate in forms to match the comments styles

## Before

![screen shot 2014-05-30 at 17 16 13](https://cloud.githubusercontent.com/assets/85783/3133071/f9329fe2-e815-11e3-8cd6-91787ce2b34b.PNG)

![screen shot 2014-05-30 at 17 12 22](https://cloud.githubusercontent.com/assets/85783/3133074/fe790bd0-e815-11e3-9d1a-bbb94178cce5.PNG)


## After

![screen shot 2014-05-30 at 17 16 00](https://cloud.githubusercontent.com/assets/85783/3133076/07401650-e816-11e3-9130-0e69dd71c11e.PNG)

![screen shot 2014-05-30 at 17 12 00](https://cloud.githubusercontent.com/assets/85783/3133075/02a98cc0-e816-11e3-8790-3d49bca77f13.PNG)

![ ](http://gifs.joelglovier.com/distracted/squirrel-up-dog-gif_large.gif)