Version 0.0.64

* WebSockets server support (optional), use "npm install websocket" add
'impress.websocket' plugin in config
* Added example for WebSockets, see /examples/connest.ws/get.js
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
folder name fixed
Version 0.0.66

* Fixed websocket plugin to display warning when "websocket" module not
installed instead of process crash
* Improved exceptions handling in Impress core, exceptions will be
logged to file, workers will restart, master will exit on exception
* Refactored plugins optional loader for all plugins
* Fixed impress.log.js, prevent exception in case when other application
deletes g
* Fixed parameters in 'exit' event when spawn worker processes
Version 0.0.66

fixed impress.require
Merge remote-tracking branch 'origin/master' into develop