v0.8.0 Zabbix integration and Docker support

Added support for monitoring switches with Zabbix throught Zabbix Agent 2 running on the Zabbix server. Supporting files including the Zabbix template have been added to the project. Updates to the pythin script will support returning switch port metrics in a format that supports Zabbix low level discovery.

Earlier updates for v0.7.0 includes support for Docker