Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

crypto/eth2_hashing/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "eth2_hashing"
+version = "0.1.1"
+authors = ["Paul Hauner <paul@paulhauner.com>"]
+edition = "2018"
+license = "Apache-2.0"
+description = "Hashing primitives used in Ethereum 2.0"
+
+[dependencies]
+lazy_static = { version = "1.4.0", optional = true }
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+ring = "0.16.9"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+sha2 = "0.8.1"
+
+[dev-dependencies]
+rustc-hex = "2.1.0"
+
+[target.'cfg(target_arch = "wasm32")'.dev-dependencies]
+wasm-bindgen-test = "0.3.12"
+
+[features]
+default = ["zero_hash_cache"]
+zero_hash_cache = ["lazy_static"]