High level design document

[colygon]

I would love to see an high level architecture example picture how all parts (API, RPC, Validator, Node, protocols, ... work together)

[ngehani]

@colinster - You can start here for now. https://docs.google.com/document/d/1DbENzLJJxu1D0CsIiPbKwT6i9QBDpT_K7XJTQPQ1J-M/edit

I agree that we need some high level architecture picture. Perhaps we can use this to create one and make it prettier.