[Zope] RDF Summary to support also newsforge RSS

I had a problem with RDFSummary showing Newsforge's feeds. I got runtime error until I added the tags described below to the RDFSummary.py-code. # Additions for newsforge 'http://slashcode.com/rss/1.0/modules/Slash/ slash': 'slash', 'http://slashcode.com/rss/1.0/modules/Slash/ section': 'section', 'http://slashcode.com/rss/1.0/modules/Slash/ comments': 'comments', 'http://slashcode.com/rss/1.0/modules/Slash/ hitparade': 'hitparade', -huima