p2p/nat: switch to github.com/huin/goupnp

Godeps/Godeps.json

Godeps/_workspace/src/github.com/huin/goupnp/LICENSE

Godeps/_workspace/src/github.com/huin/goupnp/README.md

...goupnp/cmd/example_httpu_serving/example_httpu_serving.go

.../cmd/example_internetgateway1/example_internetgateway1.go

...com/huin/goupnp/dcps/internetgateway1/internetgateway1.go

...com/huin/goupnp/dcps/internetgateway2/internetgateway2.go

Godeps/_workspace/src/github.com/huin/goupnp/device.go

.../_workspace/src/github.com/huin/goupnp/example/example.go

...kspace/src/github.com/huin/goupnp/example/example_test.go

...kspace/src/github.com/huin/goupnp/gotasks/specgen_task.go

Godeps/_workspace/src/github.com/huin/goupnp/goupnp.go

Godeps/_workspace/src/github.com/huin/goupnp/httpu/httpu.go

Godeps/_workspace/src/github.com/huin/goupnp/httpu/serve.go

Godeps/_workspace/src/github.com/huin/goupnp/scpd/scpd.go

...s/_workspace/src/github.com/huin/goupnp/service_client.go

Godeps/_workspace/src/github.com/huin/goupnp/soap/soap.go

...s/_workspace/src/github.com/huin/goupnp/soap/soap_test.go

Godeps/_workspace/src/github.com/huin/goupnp/soap/types.go

.../_workspace/src/github.com/huin/goupnp/soap/types_test.go