`mandi` provides commands for introductory physics. To install, open a command
line  and  type  the  following,  repeating 2-4 until there are no warnings:

  1. `lualatex mandi.ins`  (can also use latex)
  2. `lualatex mandi.dtx`  (lualatex is required)
  3. `makeindex -s gind.ist -o mandi.ind mandi.idx`
  4. `makeindex -s gglo.ist -o mandi.gls mandi.glo`

Move the `*.sty` files into a directory searched by TeX. Delete `vdemo.py`.