Make a 100% async implementation in a branch

[dotproto]

I've been curious about the performance characteristics of a completely asynchronous code base for a while & a performance-sensitive use case like a game seems like a good opportunity to experiment.

I'd like to create a branch that converts the entire project (or as much of it as possible) to promises & async functions. I suspect this implementation will be slower then a more imperative one but I don't have any hypothesis regarding how much slower.