Links for collective.microdata.contentlisting
collective.microdata.contentlisting-0.1.zip
https://github.com/keul/collective.microdata.core
http://en.wikipedia.org/wiki/Microdata_%28HTML%29
http://www.schema.org/
http://www.schema.org/Thing
http://plone.org/products/collective.microdata.event
http://www.schema.org/Person