Fixed a couple of bugs in ZTWebSockeT:
Fixed a couple of bugs in ZTWebSockeT:

* Disconnect after read/write didn't seem to work; disconnecting after write seems reasonable.
* The delegate wasn't informed when the socket was closed normally (on disconnect).
lukeredpath/libPusher,LoyoChengdu/libPusher,hamchapman/libPusher,alloy/libPusher,alignd/libPusher,alignd/libPusher,andreaperizzato/libPusher,andreaperizzato/libPusher,hamchapman/libPusher,lukeredpath/libPusher,LoyoChengdu/libPusher,andreaperizzato/libPusher,alignd/libPusher,lukeredpath/libPusher,lukeredpath/libPusher,alloy/libPusher,LoyoChengdu/libPusher,alloy/libPusher,alignd/libPusher,andreaperizzato/libPusher,LoyoChengdu/libPusher,hamchapman/libPusher,alloy/libPusher,hamchapman/libPusher