* changes:
[ion/device] Fix building console.o
[apps/hwtest] Add CHARGE and KEYBOARD commands to lowlevel test
[apps/hwtest] Proper MCU_SERIAL command
[ion] Add a Ion::serialNumber function
[apps/hwtest] Add ADC and BACKLIGHT commands to the lowlevel test
[ion/device] Use the proper ADC channel
[ion] Add a console facility
[apps/hwtest] Blink the LED from the lowlevel test
[apps/hwtest] The lowlevel test uses the UART
[ion/device] Add USART register
[apps] Add a lowlevel test app
[ion/device] Add SPI registers