Bring integer arithmetic up to crates.io (#3943)

* split initial

* decouple crate

* fix tests compilation

* fix rlp tests

util/src/common.rs

@@ -22,8 +22,7 @@ pub use error::*;
 pub use bytes::*;
 pub use vector::*;
 pub use sha3::*;
-pub use bigint::hash::*;
-pub use bigint::uint::*;
+pub use bigint::prelude::*;
 pub use bigint::hash;
 
 #[macro_export]

util/src/from_json.rs

@@ -17,7 +17,7 @@
 //! Coversion from json.
 
 use standard::*;
-use bigint::uint::*;
+use bigint::prelude::*;
 
 #[macro_export]
 macro_rules! xjson {

util/src/stats.rs

@@ -16,7 +16,7 @@
 
 //! Statistical functions.
 
-use bigint::uint::*;
+use bigint::prelude::*;
 
 /// Discretised histogram.
 #[derive(Debug, PartialEq)]
@@ -62,7 +62,7 @@ impl Histogram {
 
 #[cfg(test)]
 mod tests {
-	use bigint::uint::U256;
+	use bigint::prelude::U256;
 	use super::Histogram;
 
 	#[test]