Lots of progress on Yadis discovery today. We are now at a point where we are retrie...

Lots of progress on Yadis discovery today.  We are now at a point where we are retrieving and beginning to parse an XRDS document, regardless of whether the user supplied the name of a web site which supports discovery, or the direct URL of an XRDS document.  Protection against infinite recursion is in place as well.  Next time I will begin working on extracting some data from that XRDS document.