converting value objects to/from QVariant

refs #81

src/blackmisc/coordinateecef.h

@@ -37,6 +37,15 @@ namespace BlackMisc
              */
             explicit CCoordinateEcef(const BlackMisc::Math::CVector3D vector) : CVector3DBase(vector.i(), vector.j(), vector.k()) {}
 
+            /*!
+             * \brief Virtual method to return QVariant, used with DBUS QVariant lists
+             * \return
+             */
+            virtual QVariant toQVariant() const
+            {
+                return QVariant::fromValue(*this);
+            }
+
             /*!
              * \brief x
              * \return