Initial Ethash/Block skeleton implementations.

Cargo.toml

@@ -9,11 +9,12 @@ authors = ["Ethcore <admin@ethcore.io>"]
 [dependencies]
 log = "0.3"
 env_logger = "0.3"
-ethcore-util = "0.1.0"
+ethcore-util = { path = "../ethcore-util" }
 rustc-serialize = "0.3"
 flate2 = "0.2"
 rocksdb = "0.2.1"
 heapsize = "0.2.0"
+rust-crypto = "0.2.34"
 
 evmjit = { path = "rust-evmjit", optional = true }