Runway Deviation algorithm accepts runway heading in preference to calculating a heading from coordinates.
Heading Track now %360 rather than continuous.

StableApproach dependency updated to use Heading Deviation From Runway. Checks whether glideslope is established at 1000ft, and if not it does not check for ILS stability criteria.
Merge branch 'master' of github.com:FlightDataServices/FlightDataAnalyzer