All the things are tools in the toolbox. Nits: Markdown is general purpose but limited. It's a big improvement on plain text files. Thank you Aaron Swartz (RI

All the things are tools in the toolbox. Nits: Markdown is general purpose but limited. It's a big improvement on plain text files. Thank you Aaron Swartz (RIP) and John Gruber. I sure don't hand-code doc directly in PDF or PostScript formats, although people used to do the latter before TeX was ubiquitous.