gEDA-dev: Diode symbols in GSchem and PCB

[DJ Delorie]

> I wish I could show something more concrete but for now I can only do
> some handwaving while I try to piece together exactly what I think I
> need.

How about this idea: gschem symbols always have SYMBOLIC pin names,
and there's some magic that assigns slots and pinouts when mapping
them to footprints?

That way, you could also use the same NAND symbol for single, dual,
and quad nand gate chips.  Only after you map the symbol to a
footprint can you change slotting and whatnot.