Allow to customize state update action types

[haggen]

Perhaps we could accept a config querystring carrying a base64 encoded JSON of some config options.

base64(
  JSON.stringify({
    stateUpdateReq: "STATE_UPDATE_REQ",
    stateUpdateReply: "STATE_UPDATE_REPLY",
  })
);

wws://hummingbird.crz.li/my/channel?config=eyJzdGF0ZVVwZGF0ZVJlcSI6IlNUQVRFX1VQREFURV9SRVEiLCJzdGF0ZVVwZGF0ZVJlcGx5IjoiU1RBVEVfVVBEQVRFX1JFUExZIn0=

[haggen]

One thing we should consider is that in the future we might need to dispatch "client disconnect" messages to warn of broken connections. This might also need some configuration and could use of something more robust.

[haggen]

I was thinking of a different approach. Provide a Hummingbird library that wraps WebSocket, encode/decode messages in JSON and allow you to replace action types.