user expects to see evidence history date

![screenshot 2014-04-15 21 41 25](https://cloud.githubusercontent.com/assets/331004/2715295/d421c82a-c508-11e3-9f06-afb197789bc4.png)


![screenshot 2014-04-15 21 40 13](https://cloud.githubusercontent.com/assets/331004/2715297/d9e12a08-c508-11e3-970f-be0662efcd60.png)