Version 0.0.65

* SSE moved from Impress core into separate plugin impress.sse.js
* Refactored event propagation between master and workers and between
cloud controller and node clusters using IPC and ZeroMQ
* Moved userEvent, channelEvent and globalEvent from impress.sse to
impress.events namespace
* Improved example for WebSockets
* Directory /sites in default examples config.js file renamed to
/applications