Automate the sample interaction generation

[patcon]

haha ok so maybe this is overboard, but whatevs :)

Pending this issue: hubotio/hubot#613

The thought is that if the above PR were feasible, then we could consider adding hubot itself as a dev dependency, and just parse the "conversation" in the "Sample interaction" section and generate the hubot replies during the release. I suppose I just hate out-of-date and out-of-sync docs...!

(Feel free to veto, btw.)

[desmondmorris]

👍 On this. I would love to see hubotio/hubot#613 go through.