No need to quote the result in the JSON output
Do not handle any Zabbix related stuff in the core modules

* We will handle all the Zabbix related stuff in a separate helper module
s/status/success in the result message
Send result message as Unicode
Get rid of these ugly back-slashes and send result message using send_json method of ZeroMQ
Pretty-print result from status/shutdown commands
vPoller proxy sends result messages in JSON as well

* Fix management commands as well