Nevermind, Jon did!Ummm. No.
Seriously?!?? Wtf.
Not trying to be a dick here, but if you can't be bothered to click through to the post I linked to, which lays it out in better detail than I would paraphrase, I'm not taking the time to do it here.
Did you even look at the linked post? It answers your question in one sentence. Meet me half way and read the post. Then if you have questions that I can answer I'd be happy to help.
I clicked to the link twice and I didn't want to go further. I just wanted to know what Jon was talking about, not write a thesis.