Example for HyperResponse doesn't compile

Hello!

I attempted to compile the HyperResponse example (http://cyderize.github.io/rust-websocket/doc/websocket/server/upgrade/sync/struct.HyperRequest.html) with current Hyper, but it doesn't type check.

error[E0599]: no function or associated item named `http` found for type `hyper::Server<_, _>` in the
current scope
 --> src/server/mod.rs:7:5
  |
7 |     Server::http("0.0.0.0:80")
  |     ^^^^^^^^^^^^ function or associated item not found in `hyper::Server<_, _>`

error[E0308]: mismatched types
  --> src/server/mod.rs:10:32
   |
10 |             match HyperRequest(req).into_ws() {
   |                                ^^^ expected struct `hyper::server::request::Request`, found struc
t `hyper::Request`
   |
   = note: expected type `hyper::server::request::Request<'_, '_>`
              found type `hyper::Request`

error[E0599]: no method named `send` found for type `hyper::Response` in the current scope
  --> src/server/mod.rs:23:25
   |
23 |                     res.send(b"Try connecting over ws instead.").unwrap();
   |                         ^^^^

error: aborting due to 3 previous errors

Start with the HyperResponse example linked in the issue and the reported src/server/mod.rs locations, then compile it against the current Hyper API. Done means the example type-checks without the three reported errors and still demonstrates the intended WebSocket upgrade behavior.