Mob 0.7.14 released!

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Mob 0.7.14 has been released.

Added

  • Magnetometer / compass support in Mob.Motion. Request :magnetometer
    in the sensor list and the {:motion, _} message additionally carries mag
    (calibrated field, µT) and heading (degrees from magnetic north). The keys
    are present exactly when you requested :magnetometer, on both platforms,
    and each is nil when there’s no reading (device has no magnetometer, or the
    heading hasn’t fused yet) — so a compass app matches on nil rather than
    hitting a missing key, and accel/gyro-only consumers get the byte-identical
    3-key map with no extra sensor cost. iOS uses the XMagneticNorthZVertical
    reference frame (CMMotionManager); Android fuses TYPE_MAGNETIC_FIELD +
    TYPE_ROTATION_VECTOR (SensorManager), registered only on request.
    Magnetic north only (true north needs location + declination — layer
    Mob.Location). Device-verified on moto g + iPhone SE. (MOB-6, #59)
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