[tdwg-content] Add a Full Example: Re: Public comment on the Darwin Core RDF Guide

As I've been working through implementing RDF generation in a few applications and seeking to conform to the guide, I've found myself spending a good bit of time hunting through the document looking for guidance on particular situations, this leads me to a suggestion for the guide: Include, at the end of the guide, a single comprehensive example of an Occurrence record, annotated to point to relevant sections in the guide. This could serve both to quickly answer questions and as a visual index to the rest of the guide.

-Paul