merge with master
complementary filter accel and mag cutt-off frequency and damping in physical units, accel weight sent to telemetry
merge with paparazzi repo
feedback_frac corrected for both accel and mag correction, omega and zeta  nominal and min/max settings adjusted
Merge branch 'ahrs_int_cmpl_quat_correction_scaling' of https://github.com/paparazzi/paparazzi into ahrs_int_cmpl_quat_correction_scaling
[ahrs] Complementary filter gains calculated with cut-off frequency and damping settings in physical units, scaled with sensors update frequencies, for integer and float filters
Merge pull request #448 from Drumettaz/ahrs_int_cmpl_quat_correction_scaling

Ahrs int cmpl quat correction scaling