Proxes Part 1: Consent (a system for MUDs)

@cwebber shared this, but it needs boosting, because what we build for MUDs incept into network game design, so let’s make this the system we use.

This would be a neat module to include in any given Evennia game, because then one could make it available to any game; that is a huge benefit to using a game engine that is abstracted in this way.