Error and ERC fixes'

Driverboard error fixes

qerge branch emaster' of https://git.cadlab.io/Solar-Car-at-UVa/Rivanna2S into master

Annotated driverboard + fixed some footprint errors

Add precharge circuit to BatteryBoard;

Merge branch 'jeffbranch2' into 'master'

Fixed Lights

fixed some labels

Merge branch 'Jeff-branch' into 'master'

looked over Rex's notes: switching logic fix, updated component numbers, made extra GPIO pins usable, new possible digital pots