Terminal strip item can be added to diagram

Initial commit about graphics item of a terminal strip, Work in
progress.

sources/qetgraphicsitem/qgraphicsitemutility.h

@@ -22,11 +22,13 @@
 
 class QGraphicsItem;
 class Element;
+class QPainter;
 
 namespace QGIUtility
 {
 	bool centerToParentBottom  (QGraphicsItem *item);
 	bool centerToBottomDiagram (QGraphicsItem *item_to_center, Element *element_to_follow, qreal offset = 0 );
+	void drawBoundingRectSelection(QGraphicsItem *item, QPainter *painter);
 }
 
 #endif // QGRAPHICSITEMUTILITY_H