v1
==

improvements:

- add XT60 connector for battery (horizontal and vertical)
- add MCU to send activation CAN messaged
- add buck + LDO converter to power MCU

v0
==

this is mainly a board used as connector to the battery.
it provides:

- holes for wires to access the battery
- a DC barrel for charging (5.0 OD, 2.0 ID)
- a 3-pin header for the CAN port
- a 3-pin switch to turn power on/off (floating the Vsense wire)
- an LED to show when a charger is connected
- an LED to show when the battery is on