- Recently added the BCD_VERSION which uses git rev-list --count HEAD command
- Unfortunately git 1.7.1 doesn't have this, so I've added a fallback to manually counting the commits using some CMake magic

- Use commit number as the basis for bcdDevice field (maximum is 2^16)
- Change iSerial from commit date to chip Unique ID
- Update both Firmware and Bootloader to use the same scheme (bcdDevice and iSerial)
- Cleanup of Bootloader code
- Split out build info CMake commands to a new file