new version of the RDFa JavaScript bookmarklets and library

Hi all,

I've updated the RDFa bookmarklets to the latest specification, and the 
latest tests appear to pass. As always, try it here:

http://www.w3.org/2006/07/SWD/RDFa/impl/js/

Please send bug reports, and I'll do a release (with a dated URL) when I 
return from break!

-Ben