added Qt Example, next change it to fit my project

QtMeshViewer/Header/MainWindow.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <QtWidgets/QMainWindow>
+#include "ui_MainWindow.h"
+
+class MainWindow : public QMainWindow
+{
+	Q_OBJECT
+
+public:
+	MainWindow(QWidget *parent = Q_NULLPTR);
+	~MainWindow();
+
+private:
+	Ui::MainWindowClass* ui;
+};