Re: Nerve: RPC framework for Nim

[rokups]

Looks like server part also needs per-connection differentiating. await 
Hello.routeRpc(req.body) expects some global connection state which is bad. 
Maybe it could take a user object and pass it to the api? So we could call 
await Hello.routeRpc(req.body, myWebsocket) and api handler could interact with 
myWebsocket the way it needs to.