Initial version of ArduPilot compatible autopilot

- removed PX4 and MAVSDK git submodules

src/az_utils.h

@@ -0,0 +1,9 @@
+#pragma once
+
+class AzUtils
+{
+public:
+    AzUtils();
+
+    static double distance(double lat1, double lon1, double lat2, double lon2);
+};