Add support for Kibana 4

This changeset adds support for Kibana 4. Kibana 4 is very different from Kibana 3.x in that it is a JVM based application. Previous versions of Kibana were standalone JavaScript applications that only interacted with ElasticSearch as a backend.

In addition, the example in this role was updated to use a standalone ElasticSearch instance vs. the embedded ElasticSearch in Logstash.
Cool. May want to clarify that comment a bit then, as just by glancing at it I'm not sure whether I'm ignoring SSL validity with this option set to true.