Hardware update, 03v6
A new hardware version of the badge. Main changes:
*Accelerometer. Note that the accelerometer works, but badge code does not use it to collect data yet
*Removed real-time clock and all components from the back of the badge
*Removed button
*New on/off switch (more pick&place friendly)
*New battery holder
This version also includes a new firmware update to support and test these changes. Note that ehe test code no longer tests the button in boards 03v4.