react/http v0.5.0 on PHP Packagist

Feature / BC break: Change Request methods to be in line with PSR-7
(#117 by @clue)
- Rename getQuery() to getQueryParams()
- Rename getHttpVersion() to getProtocolVersion()
- Change getHeaders() to always return an array of string values
  for each header

Feature / BC break: Update Socket component to v0.5 and
add secure HTTPS server support
(#90 and #119 by @clue)

// old plaintext HTTP server
$socket = new React\Socket\Server($loop);
$socket->listen(8080, '127.0.0.1');
$http = new React\Http\Server($socket);

// new plaintext HTTP server
$socket = new React\Socket\Server('127.0.0.1:8080', $loop);
$http = new React\Http\Server($socket);

// new secure HTTPS server
$socket = new React\Socket\Server('127.0.0.1:8080', $loop);
$socket = new React\Socket\SecureServer($socket, $loop, array(
    'local_cert' => __DIR__ . '/localhost.pem'
));
$http = new React\Http\Server($socket);

BC break: Mark internal APIs as internal or private and
remove unneeded ServerInterface
(#118 by @clue, #95 by @legionth)