Release 1.2.0

• merged pull request from @bb-Ricardo
  • added command server to check status of Load Balancing Servers
  • added command hwinfo to just print information about the Netscaler itself
  • added command interfaces to check state of all interfaces and add performance data for each interface
  • added command to request performance data
  • added command to check the state of a servicegroup and its members (set warning and critical values for member quorum)
  • added Icinga2 config templates
• updated documentation and plugin_test.sh