Signature cleanup (#1921)

* Address renamed to H160 at bigint library level

* moved uint specific test from util to bigint library

* naming

* unifing hashes in progress

* unifing hashes

* cleanup redundant unwraps in tests

* Removing util/crypto in progress.

* fixed compiling

* signature cleanup in progress

* new module - ethcrypto used by ethstore and ethcore-network

* fixed compiling

* fixed compiling

* fixed merge

ethcore/src/error.rs

@@ -24,6 +24,7 @@ use client::Error as ClientError;
 use ipc::binary::{BinaryConvertError, BinaryConvertable};
 use types::block_import_error::BlockImportError;
 use snapshot::Error as SnapshotError;
+use ethkey::Error as EthkeyError;
 
 pub use types::executed::{ExecutionError, CallError};
 
@@ -238,6 +239,8 @@ pub enum Error {
 	Snappy(::util::snappy::InvalidInput),
 	/// Snapshot error.
 	Snapshot(SnapshotError),
+	/// Ethkey error.
+	Ethkey(EthkeyError),
 }
 
 impl fmt::Display for Error {
@@ -258,6 +261,7 @@ impl fmt::Display for Error {
 			Error::StdIo(ref err) => err.fmt(f),
 			Error::Snappy(ref err) => err.fmt(f),
 			Error::Snapshot(ref err) => err.fmt(f),
+			Error::Ethkey(ref err) => err.fmt(f),
 		}
 	}
 }
@@ -298,12 +302,6 @@ impl From<ExecutionError> for Error {
 	}
 }
 
-impl From<CryptoError> for Error {
-	fn from(err: CryptoError) -> Error {
-		Error::Util(UtilError::Crypto(err))
-	}
-}
-
 impl From<DecoderError> for Error {
 	fn from(err: DecoderError) -> Error {
 		Error::Util(UtilError::Decoder(err))
@@ -361,6 +359,12 @@ impl From<SnapshotError> for Error {
 	}
 }
 
+impl From<EthkeyError> for Error {
+	fn from(err: EthkeyError) -> Error {
+		Error::Ethkey(err)
+	}
+}
+
 impl<E> From<Box<E>> for Error where Error: From<E> {
 	fn from(err: Box<E>) -> Error {
 		Error::from(*err)