Config and result now have a Download button in the Crawl overview

This fixes #142

In the result overview:
![Screen Shot 2013-02-24 at 2 56 54 PM](https://f.cloud.github.com/assets/992615/190424/6bc1aea2-7eec-11e2-9a8f-a4be8510f468.png)

In the config overview:
![Screen Shot 2013-02-24 at 3 04 30 PM](https://f.cloud.github.com/assets/992615/190425/6bd0ea02-7eec-11e2-860b-4150349c8787.png)