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/Header/OglViewerWidget.h

@@ -50,9 +50,7 @@ protected:
 private:
 	void initShaders();
 
-public:
-	void openFile(const char* filePath);
-
-
+private slots:
+	void resetView();
 };