gEDA-user: [pcb] "first board" docs

[DJ Delorie]

I've been pondering the "your first board" chapter of the getting
started guide.  I want to start small enough that it can be done
without confusion or overload, but not so small that it's useless.
Maybe I should do a few steps.

First board: two-pin jumper, resistor, LED.  All stock symbols and
footprints, single layer board, no vias.

Second board: 555 blinky light.  Adds custom symbol/footprint for
power jack, maybe djboxsym for 555 (the stock one has pins in
inconvenient places).  I can include the custom files in with the
docs, too.  This can be done SS with no vias.

Third: 555 SMT blinky.  Same thing, but mostly SMT, with a ground
plane on the back.  This introduces SMT, vias, and thermals.

Comments?  Ideas?

(and yes, I skipped the "installing" section for now - that needs
people familiar with each OS to contribute)