Changes to rest_api (#480)

* Add half-finished rest api changes

* Add basic, messy changes to rest api

* Fix expect() in ApiRequest

* Remove ApiRequest, add route for beacon state

* Tidy rest api, add get state from root

* Add api method for getting state roots by slot

* Add test for URL helper

* Simplify state_at_slot fn

* Add tests for rest api helper fns

* Add extra tests for parse root

* Fix clippy lints

* Fix compile error in rest api

* Update test to new ethereum-types

beacon_node/rest_api/Cargo.toml

@@ -7,16 +7,19 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
 beacon_chain = { path = "../beacon_chain" }
+store = { path = "../store" }
 version = { path = "../version" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "^1.0"
 slog = "^2.2.3"
 slog-term = "^2.4.0"
 slog-async = "^2.3.0"
+state_processing = { path = "../../eth2/state_processing" }
+types = { path = "../../eth2/types" }
 clap = "2.32.0"
 http = "^0.1.17"
 hyper = "0.12.32"
-hyper-router = "^0.5"
 futures = "0.1"
 exit-future = "0.1.3"
 tokio = "0.1.17"
+url = "2.0"