Simple INIT script for sidekiq

Starts and Stops Sidekiq message processor. 
Update examples/sidekiq
Simplify BasicFetch#queues_cmd

And improve weight honoring.
Merge pull request #618 from brainopia/patch-1

Simplify BasicFetch#queues_cmd
Merge pull request #616 from ramiyer28/master

INIT script for Sidekiq message processor