fixing LED labels in the schematics (they are output signals, not inputs).
wip issue #13 - changing schematics
We're freeing the AD5/PIO1_4 and AD7/PIO1_11 pins.
LED1_B and LED1_R, which used these, will now use PIO3_5 and PIO3_4, respectively.
updating pcb traces (fixes issue #13: ADC availability)