Release 12

This simplifies the elasticsearch configuration making it easier to identify where the nodes are running within the bosh
cluster. This also includes a fix for Kibana 3.1.0.

 * FIX: proxy configuration to allow GET to field mapping data (#41)
 * FIX: elasticsearch warning about unregistered file appender (#43)
 * ADD: new elasticsearch attributes (job_name, job_index) based on bosh job/index (#38)
 * ADD: static elasticsearch node names based on bosh job/index
 * REMOVE: elasticsearch cloud-aws plugin (#42)