Added SuckerPunch support
Merge pull request #119 from qubemove/sucker_punch_backend

SuckerPunch support
Refactor sidekiq queue options
Add specs for SuckerPunch
Update changelog
Update README.md
Fail silently when record can't be found in workers.
Merge pull request #123 from DouweM/silent-fail

Fail silently when record can't be found in workers.