Settings ui revisions

Moved some inline CSS into stylesheet and swapped out checkbox in fav our of bootstrap's button group in Settings pages.

![arbiter](https://cloud.githubusercontent.com/assets/4713204/5533041/69b79890-89f5-11e4-9559-d86f60ddf769.png)

![notary](https://cloud.githubusercontent.com/assets/4713204/5533044/7ac7496e-89f5-11e4-87dc-53a6935e6d3e.png)

![advanced](https://cloud.githubusercontent.com/assets/4713204/5533046/7ca4ad08-89f5-11e4-8dcc-b4c595d300b2.png)