Add UPnP support for Lighthouse (#1587)

This commit was modified by Paul H whilst rebasing master onto
v0.3.0-staging

Adding UPnP support will help grow the DHT by allowing NAT traversal for peers with UPnP supported routers.

Using IGD library: https://docs.rs/igd/0.10.0/igd/

Adding the  the libp2p tcp port and discovery udp port. If this fails it simply logs the attempt and moves on

Co-authored-by: Age Manning <Age@AgeManning.com>

common/rest_types/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "rest_types"
+version = "0.2.0"
+authors = ["Sigma Prime <contact@sigmaprime.io>"]
+edition = "2018"
+
+[dependencies]
+types = { path = "../../consensus/types" }
+eth2_ssz_derive = "0.1.0"
+eth2_ssz = "0.1.2"
+eth2_hashing = "0.1.0"
+tree_hash = "0.1.0"
+state_processing = { path = "../../consensus/state_processing" }
+bls = { path = "../../crypto/bls" }
+serde = { version = "1.0.110", features = ["derive"] }
+rayon = "1.3.0"
+hyper = "0.13.5"
+tokio = { version = "0.2.22", features = ["sync"] }
+environment = { path = "../../lighthouse/environment" }
+store = { path = "../../beacon_node/store" }
+beacon_chain = { path = "../../beacon_node/beacon_chain" }
+serde_json = "1.0.52"
+serde_yaml = "0.8.11"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+psutil = "3.1.0"
+procinfo = "0.4.2"