logstash updates

*. Find out what deprecated features were removed and check I am not using them
*. Update ES requirements
*. Add changes from plugin_status to milestones	 	
*. Adjust to event schema changes
*. Change references in grok from pattern to match
*. Change grok section as 'singles' now defaults to true.
*. Use new hash syntax for pattern v. match too
*. Update Kibana install and screenshoots
*. Fix web dashboard launch
*. Include section on new configuration syntax and drop filter	 	
*. Note that type is no longer required
*. Scaling data including log retention calculations
*. Update Syslog section
*. Update multiline section
*. Add a section in C7 on codec hacking