trying to figure out battery charging

add some power terminals and arduino to layout

Merge branch 'master' of https://github.com/badgerloop-software/hardware into avionics_review

Merge pull request #50 from badgerloop-software/precharge_review

add new output job

add another output for charging LV batteries

change gain on 12V line to 0

change operating mode of INA240 amplifiers

add arduino schematic to main

create output files