Remote responses

[petterik]

One of the things lost going from REST to om.next is remote mutation responses. Maybe even reads?

Where do we put them? We want to be app-state agnostic.

Into a layer? That's sweet?

Layers are also an answer to "is my request pending or not?".

[petterik]

In sulolive we (mostly) set states on a component whenever there was a new message, then we cleared it. We also checked if the message was pending in render.

Having a :lajter/responses {symbol (fn [this response])} might be enough for the state updating stuff?
Needs apis for:

• checking status of a response
• looking up the most-recent response
• looking up all responses by key
• looking up status on reads
• test if the response was error or success

..more?