ADD: new track message, Entity class and Position class

libs/geographiclib/wrapper/excel/cgeodesic.h

@@ -0,0 +1,24 @@
+#if !defined(CGEODESIC_H)
+#define CGEODESIC_H 1
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+  void gdirect(double lat1, double lon1, double azi1, double s12,
+               double& lat2, double& lon2, double& azi2);
+
+  void ginverse(double lat1, double lon1, double lat2, double lon2,
+                double& s12, double& azi1, double& azi2);
+
+  void rdirect(double lat1, double lon1, double azi12, double s12,
+               double& lat2, double& lon2);
+
+  void rinverse(double lat1, double lon1, double lat2, double lon2,
+                double& s12, double& azi12);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif  /* CGEODESIC_H */