Tag release-blocking issues

[Ekleog]

Hey! From my experience with it I'm thinking Marvin is really great already, and could probably already be released on some percentage of all incoming github PRs (just changing the regular-poke to something that sounds more like “people needing to /status needs_reviewer when reviewers don't answer is by design and not a bug”; and maybe making the introductory message more self-explanatory for beginners — verbosity is rarely a bad thing).

So I wonder: which of the current issues, in your mind, should block releasing Marvin to eg. 5% of all incoming PRs? (well… or at least publishing an RFC to that effect?)

If I can find some spare time I'd love to try to help you in getting Marvin used in production :)