Use select2 for town forms

https://trello.com/c/ZdjvHBMP/18-select2

![select2](https://cloud.githubusercontent.com/assets/8646429/5185217/8bba0d76-748b-11e4-8c80-d3c18e528c9f.gif)

`.sort` sorts in Ruby, using unknown criteria. How about using `.order`?