TODOs

[CharlesHolbrow]

This is a wishlist generated when I was working on eternal-piano.

• Client.OnClose
• standardize communication channel between eternal-action and eternal-http
• verify safety of calling synk.Client.Loader.Publish from customClient callbacks
• Do we need a simple messaging system that is not stateful from server to clients?
• Document Loader, Mutator, and Node.
  • What needs to be closed and when?
  • Does Node (created by eternal.NewNode) need to be closed in some cases?