News just in: cool and fun side project doesn't do things the 'serious' way.
Hubot doesn't "require" Redis, don't load the `redis-brain.coffee` script. Problem solved.
Hubot is a framework for building your own useful things on top of it. Sure it doesn't provide a billion and one ways to do useful thing, you add those yourself. If it doesn't work for you, don't use it simple as.
Given it is a fun side project a company can use, I don't think the concept of "production" or "development" comes into it. You just run it. Plenty of people have run it without issues, and anyone that have had issues has been helped to have them resolved. Feel free to send a pull request to improve documentation rather than just slate it :).
Hubot is what YOU make it, not what you can just download and hope it brings useful things to your team.