Clarify WebID biblio reference

[elf-pavlik]

Capturing from #9 (comment) by @TallTed

...except that the WebID XG never published this, with or without a version declaration. It would be better to title it as what it was, "WebID 1.0 Editor's Draft" (which must be read and understood as "Editor's Draft of WebID 1.0") ... and of course, the document now served from that location says "Draft Community Group Report 05 March 2014", which is similarly but differently inaccurate and contrary to the "publisher" identified here.