* doc/org-manual.org (Attachment options)
* etc/ORG-NEWS (Org-Attach has been refactored and extended)
(New ID method based on timestamp)
* lisp/org-attach.el (org-attach-id-uuid-folder-format)
(org-attach-id-ts-folder-format)
(org-attach-id-to-path-function-list, org-attach-dir)
(org-attach-dir-from-id): Better handling of id to path
functionality. At the same time adding an id-to-path function
for timestamp-based ID that easily can be promoted to the
primary function by customization of the user.