first draft of qbo_move package. Compiling.
move_head ok, move_eyelids no effects
head_tracker to modify to use PointStamped (or put face_pos_and_dist to RegionOfInterest)
face tracking ok using the head_track launch file from the qbo_move package
todo :
check that all HR references are gone
comment
have the image values between -1 and 1 (and not -0.3 and 0.3)
comented qbo_move_head
changed the PID computation
changed the PID parameters for less overshoot
modified in face_detection to be between -1 and 1