mergesort.rs

	let mut buffer = [0, .. 8];
	let read = match fdInput.read(buffer) {
		Ok(num) => num,
		Err(e) => fail!("Couldn't read"),
	};
	println!("read {} bytes", read);
	let number = match u64::parse_bytes(buffer, 2) {
		Some(n) => n,
		None => fail!("Reading number"),
	};
	println!("parsed {}", number);