Tutorial Discussion Pull Request

Here is the progress so far. This is certainly a preliminary first draft. There are a bunch of little missing bits. Tags need to be filled out more. I think I need to fill in some gaps in the narrative, but it's a start. I also wrote it on the train, so some of the names might be wrong.

Is this the kind of thing you were looking for? Does the outline work? Are there any other major points that I should cover?