Add shoryuken async strategy

[josephchoe]

I added a new strategy for AWS SQS-based queues using the shoryuken gem.

[pyromaniac]

Cool, can you also fix the readme and the changelog please?

[josephchoe]

Done.

[pyromaniac]

ok, can you add the changelog entry on top, please? Also, did you test it manually? Does it work? If so, I'll merge it as soon as specs pass

[josephchoe]

Oops, sorry.

[josephchoe]

The specs pass, and I've tested it manually. But I think I've noticed a problem in copying the worker and specs from the sidekiq strategy to shoryuken. Shoryuken only passes in sqs_msg and body into the worker and not options, which would be a problem for passing in suffix.

https://github.com/phstc/shoryuken/blob/master/lib/shoryuken/processor.rb#L17

[pyromaniac]

can we use Shoryuken::Worker.perform_async({index: type, ids: ids, options: options}, queue: shoryuken_queue) ?

[pyromaniac]

Also, how about to use {type: type ?

[josephchoe]

Will do.

[josephchoe]

Made the requested changes. Let me know if there's anything else that needs to be addressed.

[pyromaniac]

Cool, merged, thanks!