This plugin enables folding by section headings in markdown documents.
I recommend installing markdown-folding
using pathogen or Vundle. Your vimrc
file must contain these lines at the very least:
set nocompatible
if has("autocmd")
filetype plugin indent on
endif
The markdown-folding
plugin provides nothing more than a foldexpr
for markdown files. If you want syntax highlighting and other niceties, then go and get tpope's vim-markdown plugin.