edition and work rdf changes needed

This is a list of the changes needed to:
  http://openlibrary.org/upstream/templates/type/edition/rdf.tmpl
  http://openlibrary.org/upstream/templates/type/work/rdf.tmpl

First, see the bug listed here:
  https://bugs.launchpad.net/openlibrary/+bug/598200
It seems that these have not been updated with the new "identifier" data element. There is a URN namespace for "National Bibliography Numbers" (http://tools.ietf.org/html/rfc3188) that might be usable for some of these, but that may be too complicated. It isn't obvious what the best way is to deal with these in RDF, especially without having to use a blank node.

1. Add condition to authorList so that it is not created when there is no author (line 34) (Note, may also need to make similar change to Work in RDF. Also, Work and Edition use very different methods for author: see Work lines 31/36 and Edition lines 34-39. Either is probably acceptable, but they should be the same.)
2. Make all URLs end with a "/" (e.g. "http://openlibrary.org$bookID" needs to output "http://openlibrary.org/books/OL18215289M/" not "http://openlibrary.org/books/OL18215289M". (See line 13 in type/work/rdf.tmpl)
3. Administrative section at end of Edition needs to make clear that the referent is the metadata, not the book itself. See lines 72/77 of type/author/rdf.tmpl.