0.0.1

• Initial release.
• WebSocketClient with an application-defined message type registry:
  registerMessageType, registerJsonMessageType, removeMessageType and
  typed listenMessages<T>() streams.
• Automatic reconnection on any close until disconnect() is called, with
  configurable attempt limit and interval; message streams survive reconnects.
• onSocketClose callback for the point where the client stops reconnecting.
• Mobile, desktop and web support through conditional imports.