v0.8.9

• Feature: Support explicitly choosing TLS version to negotiate with remote side
  by respecting crypto_method context parameter for all classes.
  (#149 by @clue)

  By default, all connector and server classes support TLSv1.0+ and exclude
  support for legacy SSLv2/SSLv3. As of PHP 5.6+ you can also explicitly
  choose the TLS version you want to negotiate with the remote side:

  // new: now supports 'crypto_method` context parameter for all classes
  $connector = new Connector($loop, array(
      'tls' => array(
          'crypto_method' => STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT
      )
  ));

• Minor internal clean up to unify class imports
  (#148 by @clue)