Customizes selections page

Resolves #20

Adds customized selections page at `/selections` with toolbar placeholders

![screen shot 2014-06-12 at 11 32 58 am](https://cloud.githubusercontent.com/assets/1656824/3261984/1e8b6d1a-f260-11e3-83d3-e3cb4ce61658.png)
![screen shot 2014-06-12 at 11 33 04 am](https://cloud.githubusercontent.com/assets/1656824/3261985/246ef116-f260-11e3-8a66-e68fc7804084.png)