hNews parsing: picks up non-vcard "author" elements

[bcampbell]

for example, on:
http://www.eastvalleytribune.com/local/article_aab4f0f6-725b-11df-85ae-001cc4c002e0.html

The comment authors are marked up with class="author" (but not as a vcard). The returned author data looks like:

"author": [ "Rich posted at 1:10 pm.", "JeffBrown posted at 5:49 pm.", "allamer posted at 3:06 pm.", "netzhunkee posted at 7:13 pm.", "soricobob posted at 6:23 am.", "Anakalia posted at 10:30 am." ]