Reduced and improved logging

- removed unnecessary logging
- print start date and time when application starts
- use std::cout instead of qDebug()
- better logging in DroneController classes
- renamed Controller states for better readability

src/az_mission.h

@@ -33,7 +33,7 @@ public:
 
     AzCoordinate getReturnPoint(void) const;
 
-    friend std::ostream &operator<<(std::ostream &os, const AzMission &obj);
+    friend ostream &operator<<(ostream &os, const AzMission &obj);
 
 private:
     void parse(void);