This diff makes sure we don't respond to 'open' and 'close' events that come after a 'close' event. It mirrors code in lib/socket/socket.react.js.

We need this additional state so that in the on('open' block, we can differentiate the state prior to initialization to the state after closure.

I'm actually not sure how to reproduce an open or close event after a close event. Just adding this code because it was in the other class, and I don't think it will hurt