Remove the Reactor::run method (#58)

This commit removes the `Reactor::run` method which has previously been used to
execute futures and turn the reactor at the same time. The tests/examples made
heavy usage of this method but they have now all temporarily moved to `wait()`
until the futures dependency is upgraded. In the meantime this'll allow us to
further trim down the `Reactor` APIs to their final state.

tests/echo.rs

@@ -10,7 +10,7 @@ use std::thread;
 use futures::Future;
 use futures::stream::Stream;
 use tokio::net::TcpListener;
-use tokio::reactor::Reactor;
+use tokio::reactor::Handle;
 use tokio_io::AsyncRead;
 use tokio_io::io::copy;
 
@@ -25,8 +25,8 @@ macro_rules! t {
 fn echo_server() {
     drop(env_logger::init());
 
-    let mut l = t!(Reactor::new());
-    let srv = t!(TcpListener::bind(&t!("127.0.0.1:0".parse()), &l.handle()));
+    let handle = Handle::default();
+    let srv = t!(TcpListener::bind(&t!("127.0.0.1:0".parse()), &handle));
     let addr = t!(srv.local_addr());
 
     let msg = "foo bar baz";
@@ -46,7 +46,7 @@ fn echo_server() {
     let halves = client.map(|s| s.0.split());
     let copied = halves.and_then(|(a, b)| copy(a, b));
 
-    let (amt, _, _) = t!(l.run(copied));
+    let (amt, _, _) = t!(copied.wait());
     t.join().unwrap();
 
     assert_eq!(amt, msg.len() as u64 * 1024);