[paparazzi_center] print better messages if commands exited with error
also got rid of the HUP handling in run_and_log, now only done in run_and_montior
closes #286
[doc] correct doc in board makefiles to change default actuators
[imu] aspirin: no default SMPLRT_DIV for non-default GYRO_LOWPASS"
[imu_umarim] configurable gyro lowpass and output rate
Merge branch 'master' of github.com:paparazzi/paparazzi into tudelft4.9