v1.2.0

Improvements to the Sock and WebSocketServer API:

• WebSocketServer now uses a WebSocket struct type instead of Sock; a specialized derivative of Sock with methods for accessing the underlying web socket and http connection.

• Adds new callback WebSocketServer.OnConnect, deprecating OnAccept. OnConnect receives a WebSocket struct rather than a Sock struct as is the case with OnAccept (i.e. why OnConnect was added instead of using OnAccept.)

• Adds method Sock.String() which returns a name that uniquely identifies the socket during its lifetime. Useful for logging.

• Deprecates the function WebSocketHandler() in favor for a better-named NewWebSocketServer(). Functionality is unchanged.