Feature: Merge Server class from clue/socks-server (#52 by @clue)

$socket = new React\Socket\Server(1080, $loop);
$server = new Clue\React\Socks\Server($loop, $socket);

Upgrading from clue/socks-server? The classes have been moved as-is, so you can simply start using the new class name Clue\React\Socks\Server with no other changes required.