remove RS-485

 The purpose of the RS-485 was to allow us to synch multiple
devices. However, a better way to do this is to inject a counter
into the samples using the USB Start Of Frame which will be
shared by all devices on the same USB bus.
added I2C EEPROM to shields
remove unused DAISY_SERIAL_4
add reinforced isolation to power
add No Connect where needed
complete footprints on main board
create a brd file
added footprint for touchproof socket
starting analog patch shield layout