Merged recent modifications from development branch:
- proximity sensor frequency was increased from 8Hz to 125Hz
- system synchronization frequency was increased from 8Hz to 16Hz
- I2C bus clearing functionality was improved
- magnetometer and gyroscope data are now available to the whole system
- minor enhancements
Furthermore, the makefile for flashing was modified: if no system variable SERIALBOOT is defined it will fall back to the default path.