It was too tight for MacroFab's routing tolerances before, so some
boards didn't fit well.  Now they all fit just fine, making me a happy
camper.

They're the same as v0.3, but I really ought to be explicit about that.

The Sink is now in its own file, with a module to render the board.

I added the programming jig plastic part.  It looks like it fits the jig
PCB correctly, so there's not much holding me back from releasing v0.3
at this point.