added expand / collapse for each scenario

Hello, I have some features with a lot of scenarios, so I added the funcionality to collapse / expand each one of them and the expand/collapse all in the feature.

Also, are you planning on taking out the htm that are in the classes (getName() for example) and read the values from a configuration file so basically we have much more flexibility creating the templates?

Let me know....
![expandcollapse](https://f.cloud.github.com/assets/1695672/149539/3170b97e-7531-11e2-9126-ff59b0dee356.png)