split line(old) and wall(new)

added new walling
started working on windows

params/ToolBoxWidget.h

@@ -39,6 +39,7 @@ private:
 	QPushButton* btnMeasure;
 
 	QPushButton* btnGround;
+	QPushButton* btnLine;
 	QPushButton* btnWall;
 	QPushButton* btnPillar;
 	QPushButton* btnDoor;
@@ -63,6 +64,7 @@ private slots:
 
 	void onNewGround();
 	void onNewWall();
+	void onNewLine();
 	void onNewPillar();
 	void onNewDoor();
 	void onNewObject();