[EM] Fetch authors from byline

I looked at a couple (what I thought) unrelated "news" sites and tried to find a general way of extracting author information from text.

http://www.salon.com/2012/10/10/junot_diaz_my_stories_come_from_trauma/
http://www.newyorker.com/online/blogs/backissues/2013/06/window-washers-at-the-hearst-tower.html
http://www.chicagotribune.com/news/politics/clout/chi-chicagos-unicorn-new-red-divvy-bicycle-20130801,0,2833828.story

Maybe we can change item type to like newspaperArticle if we find an author via byline (thoughts?)

I'll try to do something similar for publication date, but it looks less uniform across websites.

Also, if there are some examples that are not working, but maybe could be, let me know.