Adds simulator for syncing (#758)

* Add CLI for beacon_chain_sim

* Rename beacon-chain-sim to simulator

* Fix simulator workflow

* Push Cargo.lock

* WIP syncing simulator

* Add cli args

* Remove eth1 stuff and deposits

* Add syncing strategy simulations

* Successful one node sync

* Clean up

* Rename to avoid confusion

* add command line args

* fix cargo fmt issues

* Add additional syncing strategies

* Run all syncing strategies one after other; add comments

* Improve cli argument parsing

* Change `end_after_checks` default to true

* Small modifications to syncing-sim

* Add `strategy` cli argument

* Documented defaults in cli help

Co-authored-by: mkinney <mike.kinney@gmail.com>
Co-authored-by: Age Manning <Age@AgeManning.com>

tests/simulator/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "simulator"
+version = "0.1.0"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+node_test_rig = { path = "../node_test_rig" }
+types = { path = "../../eth2/types" }
+validator_client = { path = "../../validator_client" }
+parking_lot = "0.9.0"
+futures = "0.1.29"
+tokio = "0.1.22"
+eth1_test_rig = { path = "../eth1_test_rig" }
+env_logger = "0.7.1"
+clap = "2.33.0"