- add messages_per_second setting (LOGSTASH-962)
- update changelog
- downgrade elasticsearch to 0.20.6 (0.90.x causes errors with logstash
  probably somewhere in jruby-elasticsearch.)
- fix logstash web serving static files
- version bump
- changelog updates
Merge elasticseatch_http.rb from head & add sflychecksum
Merging upto 1.1.13