get_rot_matrix() moved to separate library, accel calibration of rotated board fixed
accelerometer calibration fix
accelerometer_calibration: code style fixed, lib/conversion copyright fix
Adjusted mavlink info messages during gyro calibration to not break QGroundControl.
calibration: bugs fixed, mavlink messages cleanup
accel/gyro/mag calibration: big cleanup, use common messages
accelerometer_calibration: stability fix
Merge pull request #483 from PX4/calib_rotation

Calibration of rotated board