updated all the scripts to start/stop kafka
changed the default replication factor
the default replication factor is sometimes ignored, so this script is better than relying on auto create topics
Merge branch 'master' of https://github.com/HernanRivasAcosta/kafkerl
fixed a bug where you could not unsubscribe from kafkerl events
Merge pull request #29 from HernanRivasAcosta/hernan.unsubscribe_fix

Hernan.unsubscribe fix