Shrinkdesc 150

Hi Andrew, I worked on the Beans Validator descriptors. We support it now but I had to change the parser a little bit.
There is a very small API change I had to introduce. I encountered that that the mappings XSD defines an attribute with name 'class' and additional a nested element called 'class'. So, I had to change very slightly the remove attribute operation. This is now called 'removeClassAttr'.

Regards,
Ralf