Proposing a Debugging section for intro_windows

I'm thinking something pretty simple like this to handle a few of the issues I hit.

1. The Error 401 code is discussed [here](https://groups.google.com/forum/#!topic/ansible-project/dyOC1cWX90w). If that's something that everyone is seeing (I did with Server 2012 VM edition) then it might need to be moved up in the document.

2. The `-vvvv` is a bit obscure I think if you're new to Ansible. I'm assuming most will have some experience with Linux and will try just `-v` which is what I tried. I then remembered from a demo that `-vvvv` was what I wanted.

3. The local admin account is something I glossed over when reading the instructions. I figured I could substitute my account for testing, since I'm an admin on that box. So calling that out could help.