Adding some markdown-ish formatting

I often have docx come in with some basic formatting that I *have* to see - italics, bold, and headings.  These tweaks should allow such to be presented unobtrusively enough in the terminal, but also allow pandoc and other tools to take the output and work with it recognizably.

I also created a version that parses OpenOffice / LibreOffice files, at least with some basic functionality (and far quicker than anything else I've seen).