Hogan edits

Made changes to the master branch by mistake. Hopefully reverted those and now working on a separate "chapter" branch for my talk. If these changes look okay, please merge them into master.

Another edit coming in the future, but this addresses the major readability issues of the original. I've also assumed that Markdown formatting of headings will translate into the final product. If I need to style headings differently I will go back and make those edits.

I've deviated from the verbatim transcription of my talk in order to clarify the text and make this more of a stand alone article. I hope this is okay?