Upgrade elasticsearch components /issue #37

 * elasticsearch 1.0.1 -> 1.2.1
 * elasticsearch-jetty 1.0.1-beta -> 1.2.1
 * marvel 1.1.0 -> 1.2.1
Upgrade kibana 3.0.1 -> 3.1.0 /issue #44
Upgrade logstash 1.3.0 -> 1.4.1 (now including logstash-contrib) /issue #45