[RDFa] Updated Javascript Library, bookmarklets, and a public version of the RDFa Clipboard

Hi all,

I've completely revamped the RDFa Javascript implementation so that it
runs in FF, Safari, and IE7 (and maybe IE6, I haven't checked) and
doesn't modify the default object prototypes, meaning it should be
compatible with more pages.

I've also put together a public version of the RDFa clipboard that some
of you saw at the Cambridge SemWeb get-together a month ago or so.

Everything is available at:
http://www.w3.org/2006/07/SWD/RDFa/impl/js/

And a stable snapshot is at:
http://www.w3.org/2006/07/SWD/RDFa/impl/js/20070301/

Have fun, send comments, etc....

-Ben