templates: freshen for current use.

- Add explicit answer_type and caching settings.
- Point to metadata documentation to help complete section.
- Rearrange metadata to match documentation.
- Update attribution with better example strings.
- Place guard clause before work clause in example code.
I was sure I had checked this before I committed.. but I just checked now and you're right!  I expect you are correct that the difference is the API and where each type is of request is fulfilled in the stack.  Honestly, I hope it turns out that in unification we can get rid of it on Goodies instead of adding it here.  It's borderline noise, even over there.