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/MainWindow.h

@@ -19,4 +19,6 @@ private slots:
 	void aboutFile();
 	void aboutTool();
 
+signals:
+	void loadFile(const char*);
 };