upgrade hyper to v0.11

src/async_impl/mod.rs

@@ -0,0 +1,11 @@
+#![cfg_attr(not(features = "unstable"), allow(unused))]
+
+pub use self::body::{Body, Chunk};
+pub use self::client::{Client, ClientBuilder};
+pub use self::request::{Request, RequestBuilder};
+pub use self::response::Response;
+
+pub mod body;
+pub mod client;
+mod request;
+mod response;