Overview improvements

Every page now has a footer, making it clear what the crawl was about:
![Screen Shot 2013-04-11 at 20 43 16](https://f.cloud.github.com/assets/992615/369459/2ad9f8f8-a2d8-11e2-894c-d1fc9ded9a25.png)

Numbers that represent infinity are shown as such:
![Screen Shot 2013-04-11 at 20 42 53](https://f.cloud.github.com/assets/992615/369468/3477d150-a2d8-11e2-8994-a4df20fd976d.png)

And there's a better representation of the Browser config and plugin config in the overview.