Add a storage backend.

[urbanslug]

Persist conversations

[urbanslug]

If we chose to do this it would be wiser to do it in Botkit itself howdyai/botkit#506

[senorcodecat]

I can't argue for the need for this more. Absolutely a most in my scenario.

[urbanslug]

@senorcodecat Hello, I looked at your issue comment on botkit and we also use multi thread conversations so if we were to work on this multi thread conversations would have to be handled for example https://github.com/goodbotai/karma/blob/master/lib/conversations/one.js#L43

Do you have an implementation plan? What is it?

Offtopic: what is your experience with bots on AWS Lambda?

Edit:
Here's our implementation plan, still a work in progress https://github.com/goodbotai/botkit/blob/506-add-storage-backend/docs/persistence.md