[uf-new] New proposal: Elemental microformat for content boundaries

[Indus Khaitan]

Something basic and more elemental than using hAtom as a requirement
for demarcating content boundaries; which can be used across any
microformat which deals with content.

> The weakest parts of hAtom right now are the required element issues.

True. Not every piece of arbitrary content may have date, author and
title. Content may just have text.