Show human readable interface names

Requested on forums (http://qbforums.shiki.hu/index.php?topic=1662.0)

Mostly intended for Windows users, shouldn't have any effect on Unix (http://doc.qt.digia.com/qt/qnetworkinterface.html#humanReadableName)

Looks like this:
![iface_names](https://f.cloud.github.com/assets/1910559/62855/2c2f3690-5d88-11e2-85da-d55b6bd58c10.png)

If anybody is wondering whats wrong with interface names on Windows, here's an example:
![iface_names_old](https://f.cloud.github.com/assets/1910559/62875/f81aac68-5d8c-11e2-9f57-ad03e439f30a.png)