Added Dandelion-Datatables

Hi Michael,

I added Dandelion-Datatables to have the tables a bit nicer. :-)
Since there are very few data, I disabled the DataTables paging.
Moreover, you can see how to easily enable PDF export.

The second commit adds the backward compatibility with servlet 2.x containers as Tomcat 6.

Hope you'll enjoy!

Regards,
Thibault