added specular, ambient light,...

need to fix the texutre gamma correction,
look at the todos

QtMeshViewer/Header/FileInterface.h

@@ -44,6 +44,8 @@ struct Material {
 	QString name;
 	QOpenGLTexture* texture = Q_NULLPTR;
 	bool transparent = false;
+	float shininess = 80;						//TODO: read from file
+	QVector3D specularColor = {1.0,1.0,1.0};	//TODO: read from file
 };
 
 class FileInterface : public QObject