OSInfo improvements

More information about OS in Server Information and User Information.

Screens:
![win7_zuko](https://f.cloud.github.com/assets/521035/1318807/041c1d5e-32c5-11e3-8f80-24ee5c4a9cc9.png)  ![win_xp](https://f.cloud.github.com/assets/521035/1318808/0767797c-32c5-11e3-912d-f20fbfd4bf4a.png)

![murmur](https://f.cloud.github.com/assets/521035/1318809/09786ee2-32c5-11e3-89f8-6a44e440c237.png)