v0.5.0

• Feature / BC break: Replace listen() call with URIs passed to constructor
  and reject listening on hostnames with InvalidArgumentException
  and replace ConnectionException with RuntimeException for consistency
  (#61, #66 and #72 by @clue)

  // old
  $server = new Server($loop);
  $server->listen(8080);
  
  // new
  $server = new Server(8080, $loop);

  Similarly, you can now pass a full listening URI to the constructor to change
  the listening host:

  // old
  $server = new Server($loop);
  $server->listen(8080, '127.0.0.1');
  
  // new
  $server = new Server('127.0.0.1:8080', $loop);

  Trying to start listening on (DNS) host names will now throw an
  InvalidArgumentException, use IP addresses instead:

  // old
  $server = new Server($loop);
  $server->listen(8080, 'localhost');
  
  // new
  $server = new Server('127.0.0.1:8080', $loop);

  If trying to listen fails (such as if port is already in use or port below
  1024 may require root access etc.), it will now throw a RuntimeException,
  the ConnectionException class has been removed:

  // old: throws React\Socket\ConnectionException
  $server = new Server($loop);
  $server->listen(80);
  
  // new: throws RuntimeException
  $server = new Server(80, $loop);

• Feature / BC break: Rename shutdown() to close() for consistency throughout React
  (#62 by @clue)

  // old
  $server->shutdown();
  
  // new
  $server->close();

• Feature / BC break: Replace getPort() with getAddress()
  (#67 by @clue)

  // old
  echo $server->getPort(); // 8080
  
  // new
  echo $server->getAddress(); // 127.0.0.1:8080

• Feature / BC break: getRemoteAddress() returns full address instead of only IP
  (#65 by @clue)

  // old
  echo $connection->getRemoteAddress(); // 192.168.0.1
  
  // new
  echo $connection->getRemoteAddress(); // 192.168.0.1:51743

• Feature / BC break: Add getLocalAddress() method
  (#68 by @clue)

  echo $connection->getLocalAddress(); // 127.0.0.1:8080

• BC break: The Server and SecureServer class are now marked final
  and you can no longer extend them
  (which was never documented or recommended anyway).
  Public properties and event handlers are now internal only.
  Please use composition instead of extension.
  (#71, #70 and #69 by @clue)