created kicad_pcb files and new (hopefully equivalent) gerbers for the control and analog boards.

there are still some nuisance drc warnings, mostly regarding silkscreen overlap and some weird stuff going on with the footprints and the nets associated with the pads after refreshing between sch and pcb files. but it should be good for the fab shop. (i checked everything against JLC specs) this was my first big pcb project in kicad, so please look it over and let me know if you see that i did something stupid. i am always happy to receive advice and feedback. also updated the usb + din midi expander panel to latest, to fix midi input/output orientation and ZAP icon. (should have made it reversible! thats a next week project) (i reset and got rid of my other commit message mods, ignore this message)