I like that you explain a bit more about `config!` here, I think it is a good pattern for a recipe. The *Discussion* is still a little light though; detailed discussions of `config!`, `pack!` and `show!` would be great. What other Seesaw/Swing concepts could we cover? I'd also like to see general Seesaw patterns for developing more complex interfaces in this discussion (You don't necessarily have to do that right now, but a `TODO` with a place for it would be great.)