fix typo
power Si86xx from 3.3V_ISO rather than super-quiet 3.3VADC
moved label to show wire keeps going
create arduino-shield component
wire-in arduino-shield headers to SAM3X
add header for ADS129x_GPIO pins
add header for RS-485
move RS-485 to the patch-shield
replace protection diodes on USB with USBLC6
include patch-shield.pro