Redesign attester pages

Change style in homepage and status pages.

The homepage now displays configuration information while the status provides more details on connected browsers and remaining tasks.

This closes #6 as well.

Landing page looks like this
![index](https://f.cloud.github.com/assets/680284/402625/c8fc27da-a905-11e2-98c9-f5749a2f1c2b.png)
and status is
![status](https://f.cloud.github.com/assets/680284/402626/e9ef7168-a905-11e2-8cf4-e0d5cdeef2a3.png)