UPnP support

[deecypher]

Just as Transmission torrent download client provides an option to automatically forward ports using Universal Plug n' Play, so should Powder Player. Sometimes users don't have access to the router to manually forward ports, but as long as UPnP is enabled, the ports should forward automatically.

Great work so far!!

[jaruba]

i'll look into it, thanks you for the kind words and suggestion