Show crawljax version in overview

Shows some crawljax version info in the configuration view.

The complete git.properties containing all other info is included in the output folder.

![Screen Shot 2013-03-15 at 18 22 15](https://f.cloud.github.com/assets/992615/264630/e849acca-8d94-11e2-87ef-b0090b0620d2.png)

Fixes #167