v1.2.1

Go library: Adds the ability to gracefully shut down sockets via a new method Socket.Shutdown (low level). Note that Web Socket-based gotalk does not need this.

JS library: Increases the minimum reconnect delay after a clean connection close in keepalive. This has no effect on the API and no effect on semantics. When a server restarts and cleanly shuts down sockets, avoid slamming the server immediately with connection attempts. A future version might introduce randomness to this delay as well.