Flatter than I hoped for

[Doug Lerner]

I was having so much trouble getting substacks of substacks to work, and the
main reason I was doing this was to gain access to the handlers, that I
ended up re-arranging all the handlers and putting almost all of them in the
mainstack stack script, leaving only specific openStack (and things like
that) in the separate stack scripts.

This required only minor handler modifications to tell each handler *which*
stack the request came from because "this stack" was no longer appropriate
in most cases.

This is "ok", but I was hoping to be able to do this more modularly -
keeping all of a particular stack's handlers within a substack. But as soon
as I needed a depth of more than 2 (a substack of a substack) this became
unfeasible.

So the entire project is a lot less modular than would be nice if we wanted
to allow a group of people to work on the project.

I think better support for a more flexible stack hierarchy would be useful
in future Rev enhancements. Especially for groups of people working together
on a single project, or for creating plugin features to an existing app.

doug