Add webmention support

![](http://dissociatedpress.com/wp-content/uploads/2011/02/oh-the-huge-manatee.jpg)
These methods are heinous, but I couldn't come up with a better way to attempt to account for the presence or lack of presence of necessary properties (author's name, photo, a URL, etc.) Each of these pieces may or may not be in the parsed HTML/microformats, so I have to account for each of them individually.

Is there a better or easier way...?