gEDA-user: [pcb] terminology

[DJ Delorie]

> The last sentence in the definition of annulus seems ambiguous:

I rewrote it to make it clearer, and added examples.  I'll probably go
through and add illustrations to many of those also.

>     When the netlist and the board agree, the board is done.
>
> The simplest thing to do is remove the sentence.

I replaced it with text that says what PCB actually does with the
netlist.

> However, I doubt that it will make me sound any smarter as I post a
> comments since that will require more than a good vocabulary 8^)

Knowing the terminology is an *enabler* to knowledge.