Version 1.0.10 - Add getGeoidalSeparation()

This release:

• Adds the method getGeoidalSeparation()
  • In this library, getAltitude returns the Height above mean sea level (meters) from the BESTNAVB message
  • Other GNSS libraries return the Height above Ellipsoid
  • To calculate the Height above Ellipsoid manually:
  • double heightAboveEllipsoid = myGNSS.getAltitude() + myGNSS.getGeoidalSeparation();