gEDA-dev: New diagram (attempt at UML)

[Ales Hvezda]

[snip]
> Alternatively, we could extend the file-format slightly to allow
> multiple pages per file (and make this the "official" way of defining a
> "circuit").

gEDA/gaf was intentionally designed to have a one-to-one relationship
between schematic pages and files.  This allowed all sorts of easy and
interesting post processing (read: shell script, perl, etc...) to occur
on a individual schematic page.  Changing or even augmenting this core
assumption should be done with care.

-Ales