- Added parameter in order to eliminate
  "With Members" filter option
-- Introduced CSS versioning
   With each update of the skin CSS the version no. should be set to the cvs revision number in the string_aux1 attribute of the skin category
   This way a reload of the CSS is forced when a user request a page for the first time after an update
ToDo:
   - Versioning for style-js and other CSS files loaded (style.common.css, etc.)