Maps-Api a"geodesic: true" - Option added

At long straight distance the trackpoints and the optimized polyline are displayed at the identical position. Through the Mercatorprjection there was a difference. See http://forum.routeconverter.com/thread-1564.html
Merge pull request #18 from EddiVonDerAlm/geodesicPolyline

Lösung zum Problem der Trackabweichung