[rkdarst]

• At some meeting about contribution, we realized that our lessons are
  fairly stable and if a new person goes and contributes a big
  re-write, it probably can't be accepted with lots of discussion.
  Thus, we should say to talk with us first, but send suggestions for
  our next "round of revisions.

• This implements my attempt at saying that. Commits were made some
  time ago but are only being pushed now because I forgot about them.

[samumantha]

Thanks. I wonder if we should have some section "this is how we ideally would be" and "this is what happens in practice" ? Especially when we have new people joining they might want to (and be able) to follow the ideal case. Also with lesson maintainers we get a step closer to how we may want to do updates in the future.