Users can sort auctions by name

https://trello.com/c/c1sAlUTC/35-as-a-user-i-can-sort-auctions-by-name

![image](https://cloud.githubusercontent.com/assets/8681076/5013405/7de8378e-6a5b-11e4-8101-da4ce011a473.png)

![image](https://cloud.githubusercontent.com/assets/8681076/5013410/87bc28c4-6a5b-11e4-9066-846b649b9665.png)