might need to fix deployment to continue pushing .Rmd files to gh-pages branch
pros: folder per chapter could sort of mirror folder (package) per analysis. this effect might not be worth it unless we zip the folders and keep data in a data/ folder per chapter.
see workaround here: https://github.com/rstudio/bookdown/issues/418
might need to fix deployment to continue pushing .Rmd files to gh-pages branch
data/
folder per chapter.