- add queues and threads internals doc from   https://gist.github.com/1473939
- add queues and threads internals doc from
  https://gist.github.com/1473939

opentable/logstash-kafka,joekiller/logstash-kafka,joekiller/logstash-kafka,opentable/logstash-kafka,Aloomaio/logstash-kafka,tinglinux/logstash-kafka,Aloomaio/logstash-kafka,tinglinux/logstash-kafka