LSM9DS0_AHRS

Modified library and added sketch for 9DoF sensor fusion using
open-source Madgwick and Mahony quaternion algorithms. Output example of
AHRS-based yaw/pitch/roll using quaternions as the source for the input.
Update LSM9DS0_AHRS.ino
update filter rate info
Update LSM9DS0_AHRS.ino
Update LSM9DS0_AHRS.ino
improved error ha on startupndling
Merge pull request #4 from kriswiner/LSM9DS0_AHRS

LSM9DS0_AHRS