Use primitive-types crate to unify Parity Ethereum primitives (#1187)

* Unify primitive types with parity-ethereum

* Update primtive-types patch version

* Fix merge issue

* Add necessary fixed-hash features

* Fix node-primitives compile

* Reexport impl_serde::serialize as bytes to avoid path changes

substrate/core/primitives/src/lib.rs

@@ -21,12 +21,7 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(not(feature = "std"), feature(alloc))]
 
-#[macro_use]
-extern crate crunchy;
-#[macro_use]
-extern crate fixed_hash;
-#[macro_use]
-extern crate uint as uint_crate;
+extern crate primitive_types;
 #[macro_use]
 extern crate parity_codec_derive;
 
@@ -51,6 +46,10 @@ extern crate untrusted;
 #[macro_use]
 extern crate hex_literal;
 
+#[cfg(feature = "std")]
+#[macro_use]
+extern crate impl_serde;
+
 #[cfg(feature = "std")]
 #[macro_use]
 extern crate serde_derive;
@@ -84,7 +83,8 @@ use rstd::prelude::*;
 use rstd::ops::Deref;
 
 #[cfg(feature = "std")]
-pub mod bytes;
+pub use impl_serde::serialize as bytes;
+
 #[cfg(feature = "std")]
 pub mod hashing;
 #[cfg(feature = "std")]