v0.2.0

• BC break: More SOLID design, reuse existing code, refactor code to fix
  ambiguities and ease extending
  (#1)
  • The event loop handling has been rewritten and now resides in the
    Socket\React\EventLoop namespace. Whole new API regarding SelectPoller
    and dedicated SocketSelectLoop.
  • Rename Datagram\Datagram to Datagram\Socket
  • Merge Stream\Stream into Stream\Connection
  • Remove bind(), connect() and setOptionBroadcast() methods from
    Datagram\Socket and add respective options to the Datagram\Factory class.
    This is done in order to keep the API clean and to avoid confusion as to
    when it's safe to invoke those methods.
  • Require clue/datagram and implement its Datagram\SocketInterface
    for Socket\React\Datagram\Socket. This means that you can now pass an
    instance of this class where other libaries expect a datagram socket.
• Fix: Typo in Socket\React\Stream\Server that passed null
  (#4 thanks @cboden!)
• Fix: End connection if reading from stream socket fails
  (#7)
• Fix: Compatibility with hhvm
  (#8)