Add sublinks to thirds

Before:

![screen shot 2014-11-04 at 17 53 55](https://cloud.githubusercontent.com/assets/1001642/4904943/9cfa7ec2-644b-11e4-8789-9756032cb371.png)

After:

![screen shot 2014-11-04 at 17 54 02](https://cloud.githubusercontent.com/assets/1001642/4904947/a23eee36-644b-11e4-9d52-7ecc863fdfa3.png)

Also changed to use a case match, which is cool as if we add an item and forget to add it there we'll get a compile time error. COMPILER HOW I LOVE YOU SO!