New FileUtil::makeRelativeIfInDir func; label parser_3 barcode map; unit tests

glabels/MainWindow.cpp

@@ -217,7 +217,7 @@ namespace glabels
 		if ( mModel )
 		{
 			delete mModel->merge(); // Ownership of final Merge instance is ours
-			delete mModel->variables(); // Ownership of final Variables instance is ours
+			delete mModel->variables(); // Ownership of Variables instance is ours
 			delete mModel;
 		}
 	}