Goodie Auto-Templating.

This approximates the way things work on the production back-end, without requiring
all of the infrastructure.
> Which proxied request?

Spice fulfillment happens in two parts: initial request to the server and a follow-on proxied request to the API.  The templates are "filled out" on the return from the source.  That difference in flow  (the missing "callback" event) is enough to require a different approach to getting the templates filled out.

We'll work on unifying this as we proceed, though.