Merge request: UPnP support
UPnP support is added in connections panel for discovering internet gateway devices and enabling port-forwarding for ORPort.
No new dependencies are added, SOAP is parsed manually. A green notice is shown below the connections panel if a UPnP device is found. (Am not so sure though about the red notice in case they're not found, it looks intrusive and UPnP isn't "critical". Will remove it if that's what others think.)
Development was done in my krkhan branch where individual commits can be found. I have squashed and formatted a patch at: https://gist.github.com/1459276