Ugh.... Your Tutorial is a little lacking IMHO. It also seems like at the end you just cut off. Like you don't finish it. There is ALOT more that can be said. First you could go into detail on each. The detail that you gave on what each one does was rather limited. (Not very acurate either IMHO.)

You could put alot more into this Tutorial. It seems as if you woke up and said let's right something and wrote it in like 5 minutes and posted it.

If you need more info there are plenty of sources out there. One you could use google. Two ask around.

But I must be honest wtf was that?

Hmm...

Here if you need help writing it get someone to help you. If you need help send it to me I will help you work on it. but that was not very good IMHO.