add exe icon,

signal-slot for openFile,
resetView on openFile,
cleanup when open a new file,
triangulate quad poly now correctly, more not working, bug from previous version,
next:
fix 5,6,.. triangulation,
triClothMan, IC Helmet, still buggy,

QtMeshViewer/Source/MainWindow.cpp

@@ -26,7 +26,6 @@ MainWindow::MainWindow(QWidget *parent)
 	QSurfaceFormat::setDefaultFormat(format);
 
 	setCentralWidget(new OglViewerWidget(this));
-
 }
 
 MainWindow::~MainWindow()
@@ -37,7 +36,7 @@ MainWindow::~MainWindow()
 void MainWindow::openFile()
 {
 	QString fileName = QFileDialog::getOpenFileName(this, "Open File", "../Release/Msh", "Mesh (*.msh)");
-	dynamic_cast<OglViewerWidget*>(centralWidget())->openFile(fileName.toStdString().c_str());
+	emit loadFile(fileName.toStdString().c_str());
 }
 
 void MainWindow::aboutFile()