[#17] fix: use ADC1-ADC0 to measure Vout (Vout := Vout+ - Vout-)
Merge remote-tracking branch 'upstream/master' into no-arduino

Conflicts:
	src/hardware/GTPowerA6-10-generic/GTPowerA6-10.cpp
	src/hardware/GTPowerA6-10-generic/adc.cpp