Pass git commit info to MCU code via COMMIT_INFO #define
Add skeleton TWI.h for three-wire interface support (aka I2C)
Bug fix in boot packet initializer (was causing an avr-gcc warning)
Implement initTWI() following twi_init() in Wire/utility/twi.c, but
without enabling any TWI interrupts
Add a skeleton header for the BMP180 sensor
Work in progress on TWI communication for BMP180