adding qt resources

src/qtviewer/main.cpp

@@ -6,7 +6,11 @@ int main(int argc, char *argv[])
 {
   QApplication app(argc, argv);
 
+  QIcon appIcon(":/resources/ifcopenshell_logo.png");
+
   MainWindow window;
+
+  window.setWindowIcon(appIcon);
   window.show();
 
   return app.exec();