Rename to tokio-core, add in futures-io

Renames the futures-mio crate to tokio-core, pulls in the futures-io crate under
an `io` module, and gets everything compiling.

src/bin/sink.rs

@@ -5,8 +5,7 @@
 
 #[macro_use]
 extern crate futures;
-extern crate futures_io;
-extern crate futures_mio;
+extern crate tokio_core;
 
 use std::env;
 use std::iter;
@@ -14,13 +13,13 @@ use std::net::SocketAddr;
 
 use futures::Future;
 use futures::stream::{self, Stream};
-use futures_io::IoFuture;
+use tokio_core::io::IoFuture;
 
 fn main() {
     let addr = env::args().nth(1).unwrap_or("127.0.0.1:8080".to_string());
     let addr = addr.parse::<SocketAddr>().unwrap();
 
-    let mut l = futures_mio::Loop::new().unwrap();
+    let mut l = tokio_core::Loop::new().unwrap();
     let server = l.handle().tcp_listen(&addr).and_then(|socket| {
         socket.incoming().and_then(|(socket, addr)| {
             println!("got a socket: {}", addr);
@@ -34,10 +33,10 @@ fn main() {
     l.run(server).unwrap();
 }
 
-fn write(socket: futures_mio::TcpStream) -> IoFuture<()> {
+fn write(socket: tokio_core::TcpStream) -> IoFuture<()> {
     static BUF: &'static [u8] = &[0; 64 * 1024];
     let iter = iter::repeat(()).map(|()| Ok(()));
     stream::iter(iter).fold(socket, |socket, ()| {
-        futures_io::write_all(socket, BUF).map(|(socket, _)| socket)
+        tokio_core::io::write_all(socket, BUF).map(|(socket, _)| socket)
     }).map(|_| ()).boxed()
 }