Issue 13 edge information

Fixes #13 

* Shows edge information on the side if you click on an edge. The box is transparant so you can see states behind it in case of a big network.
* Improved help menu in the Nav bar.
![Screen Shot 2013-01-19 at 16 18 41](https://f.cloud.github.com/assets/992615/80360/a762d87c-624b-11e2-8925-33c578757fc8.png)
![Screen Shot 2013-01-19 at 16 11 34](https://f.cloud.github.com/assets/992615/80359/a74db3a2-624b-11e2-9a40-319d58ef27ed.png)