Show enums using select element

![screen shot 2014-09-30 at 3 50 12 pm](https://cloud.githubusercontent.com/assets/671378/4467759/30fa1b50-48f4-11e4-8a1e-b45fbfbf7ad7.png)

![screen shot 2014-09-30 at 3 50 50 pm](https://cloud.githubusercontent.com/assets/671378/4467767/4a19a308-48f4-11e4-80ac-e6dec45c8212.png)

Closes #249

/cc @benogle