added support for ground truth points: \n -layer for gt points \n -button with icon

-saving and loading support

params/ToolBoxWidget.h

@@ -43,6 +43,7 @@ private:
 	QPushButton* btnWifi;
 	QPushButton* btnBeacon;
 	QPushButton* btnPOI;
+    QPushButton* btnGTP;
 
 	QPushButton* btnImage;
 
@@ -60,6 +61,7 @@ private slots:
 	void onNewAccessPoint();
 	void onNewBeacon();
 	void onNewPOI();
+    void onNewGTP();
 
 	void onNewImage();