Add a simple threaded hello world example.

examples/hello.rs

@@ -0,0 +1,23 @@
+extern crate hyper;
+
+use std::sync::TaskPool;
+use std::io::net::ip::Ipv4Addr;
+
+static PHRASE: &'static [u8] = b"Hello World!";
+
+fn hyper_handle(mut incoming: hyper::server::Incoming) {
+    let mut pool = TaskPool::new(100, || { proc(_) { } });
+
+    for (_, mut res) in incoming {
+        pool.execute(proc(_) {
+            let mut res = res.start().unwrap();
+            res.write(PHRASE).unwrap();
+            res.end().unwrap();
+        });
+    }
+}
+
+fn main() {
+    hyper::Server::http(Ipv4Addr(127, 0, 0, 1), 3000).listen(hyper_handle).unwrap();
+}
+