Initial beacon node setup.

- Add network crate.
- Add sync crate.
- Add version crate.
- Add lighthouse configuration.
- Add network configuration.

beacon_node/network/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "network"
+version = "0.1.0"
+authors = ["Age Manning <Age@AgeManning.com>"]
+edition = "2018"
+
+[dependencies]
+# SigP repository until PR is merged
+libp2p =  { git = "https://github.com/SigP/rust-libp2p", branch = "gossipsub" }
+version = { path = "../version" }