Inclusion of all formats in single branch, re-written download script, latex templates, makefile, addition of chapters 86-96, and removal of authors notes

I made large number of changes to this project. One of my goals was to create book-style pdfs suitable for printing physical volumes.

All formats were moved into sub-directories of the master branch. A makefile is use to download chapters and convert between different formats. Markdown is the intermediate format from which all other formats should be built. LaTeX is used to build pdfs.

A large chunk of my work went into creating the `hpotter` LaTeX style, which emulates the American versions of Harry Potter, as well as the pdf on hpmor.com. This was my first attempt at writing LaTeX packages, but I think the results are decent.

I ended up deciding to delete the authors notes from the beginning and end of the chapters. They could be added back in as separate files (ex: `markdown/001.pre.md` or `markdown/085.post.md`). This would make it easier to automatically convert them between formats while maintaining the option to omit them.

I added the latest chapters, but have not had a chance to format them yet.

For more information, see `README.md`.

I'm not sure if this is the direction you saw the project going, but feel free to merge my changes if you like them.