[WIP] @orta => Mainscreen contents

Kind of a proof-of-concept to let you know the direction I'm going in.

![screen shot 2014-10-01 at 12 00 03 pm](https://cloud.githubusercontent.com/assets/498212/4473346/ba9a0598-4951-11e4-9c09-329e519d1906.png)


Still left to do:

- [ ] get all the TODOs todid.
- [ ] snapshot test for listings VC
no preference, would have done if ugly.