1. start with a particular h-entry to determine authorship for, and no author. if no h-entry, then there's no post to find authorship for, abort.
2. parse the h-entry
3. if the h-entry has an author property, use that
4. otherwise if the h-entry has a parent h-feed with author property, use that
5. if an author property was found
   1. if it has an h-card, use it, exit.
   2. otherwise if author property is an http(s) URL, let the author-page have that URL
   3. otherwise use the author property as the author name, exit
6. if there is no author-page and the h-entry's page is a permalink page, then
   1. if the page has a rel-author link, let the author-page's URL be the href of the rel-author link
7. if there is an author-page URL
   1. get the author-page from that URL and parse it for microformats2
   2. if author-page has 1+ h-card with url == uid == author-page's URL, then use first such h-card, exit.
   3. else if author-page has 1+ h-card with url property which matches the href of a rel-me link on the author-page (perhaps the same hyperlink element as the u-url, though not required to be), use first such h-card, exit.
   4. if the h-entry's page has 1+ h-card with url == author-page URL, use first such h-card, exit.

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