VRBRAIN: deleted unnecessary customizations
VRBRAIN: changed the management of the pwm output
Added ROI and guided mode for XTRACE
XTRACE: modified firmware version
Dataflash: added ROI amd FollowMe messages
VRBRAIN: deactivated buzzer for VR Micro Brain board
VRBRAIN: deactivated buzzer and activated tone_alarm (added new library) for VR Micro Brain
VRBRAIN: added initialization of tone_alarm on startup
VRBRAIN: deactivated buzzer from makefile for VR Micro Brain