added many more source code comments
added many more source code comments

nakijun/vtp,nakijun/vtp,markraz/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp