Switch to string crate (#6)

src/lib.rs

@@ -25,6 +25,8 @@ extern crate byteorder;
 #[macro_use]
 extern crate log;
 
+extern crate string;
+
 pub mod client;
 pub mod error;
 mod hpack;
@@ -32,8 +34,6 @@ mod proto;
 mod frame;
 pub mod server;
 
-mod util;
-
 pub use error::{ConnectionError, Reason};
 pub use frame::StreamId;
 pub use proto::Connection;