Environment Redesign

[DavidVorick]

For now, I'm just going to leave things as-is, but it seems like the design of Envrionment needs a second look.

Right now it's essentially one monolith, which could either be a good or a bad thing. It definitely needs some mutexes, which is going to be a pain.

Originally I designed states and wallets and hosts with the idea that a single environment could house multiple of each, but that has since transformed into an Envrionment which is pretty rigid and can't really support multiple of each. This could be for the better, but it happened accidentally and I haven't really had time to consider the consequences.

For the closed beta, the plan is to keep things as steady as possible, but then to do a bit of a rework immediately following.