The is a distribution of Org-mode, a plain text notes and project planning
tool for Emacs.
The homepage of Org-mode is at http://orgmode.org
The manual is in the file org.pdf, it includes a section about installation.
The xemacs directory contains special code for XEmacs users, in particular
a port of the GNU Emacs outline.el to XEmacs. Org-mode does not work
under XEmacs without this file installed. It did until version 4.37,
but no longer.
If this is the git project, there are additional directories here:
CONTRIB
contains bits and pieces contributed by users. These are not yet
part of the Org-mode core, and also not part of Emacs.
EXPERIMENTAL
files that contain code bits for experimenting. Nothing has been
decided on what to do with these.