- Switch to use upstream repository on GitHub.
- Byte compile .el file and install them to ${EMACS_VERSION_SITE_LISPDIR}.
- Add DOCS option.
ChangeLog: https://github.com/jrblevin/markdown-mode/blob/v2.4/CHANGES.md
PR: 257899
Approved by: maintainer timeout (> 1 month), meta (mentor),
ygy (mentor)