Added :progress output style

I wanted a tighter output, so I added `:progress`.

![screen shot 2014-12-18 at 9 39 53 am](https://cloud.githubusercontent.com/assets/1479215/5492875/32c5cf68-869a-11e4-870f-1eaf8a492ea1.png)

![screen shot 2014-12-18 at 9 39 29 am](https://cloud.githubusercontent.com/assets/1479215/5492878/35fb613e-869a-11e4-9787-2154eb4ee257.png)