Simple wrapper around mio's Poll method.

``` rust extern crate mio; extern crate miopollwrapper;

use miopollwrapper::PollWrapper; use mio::net::TcpListener; use std::collections::HashMap;

fn main() { let mut handle = PollWrapper::new().unwrap();

let listener = TcpListener::bind(&"0.0.0.0:8000".parse().unwrap()).unwrap();

let process_token = handle.register(&listener).unwrap();
let mut clients = HashMap::new();

let result: ::std::io::Result<()> = handle.handle(|event, handle| {
    if event.token() == process_token {
        let (stream, addr) = listener.accept()?;
        println!("Accepted socket from {:?}", addr);
        let token = handle.register(&stream)?;
        clients.insert(token, stream);
    } else if let Some(client) = clients.get_mut(&event.token()) {
        println!("Received data from client {:?}", client.peer_addr());
    }
    Ok(())
});

if let Err(e) = result {
    println!("Could not execute: {:?}", e);
}

} ```