Add explicit ToOwned imports.

src/builder/export.rs

@@ -1,4 +1,5 @@
 use std::string::String;
+use std::borrow::ToOwned;
 use super::invoke::{Invoke, Identity};
 use elements;
 

src/builder/import.rs

@@ -1,6 +1,7 @@
-use std::string::String;
-use super::invoke::{Invoke, Identity};
+use super::invoke::{Identity, Invoke};
 use elements;
+use std::borrow::ToOwned;
+use std::string::String;
 
 /// Import builder
 pub struct ImportBuilder<F=Identity> {

src/elements/module.rs

@@ -1,5 +1,6 @@
 use io;
 use std::vec::Vec;
+use std::borrow::ToOwned;
 use byteorder::{LittleEndian, ByteOrder};
 
 use super::{Deserialize, Serialize, Error, Uint32, External};

src/elements/section.rs

@@ -1,6 +1,7 @@
 use io;
 use std::vec::Vec;
 use std::string::String;
+use std::borrow::ToOwned;
 use super::{
 	Serialize,
 	Deserialize,

src/lib.rs

@@ -36,4 +36,5 @@ mod std {
 	pub use alloc::vec;
 	pub use alloc::string;
 	pub use alloc::boxed;
+	pub use alloc::borrow;
 }