def area_not_for_roles(*user_roles, &block)
      options = last_option(user_roles)
      not_for_roles user_roles do             
        clazz = options[:class] || 'special'
        area(:class => clazz, &block)
      end
    end
def area_not_for_roles(*user_roles, &block)
      options = last_option(user_roles)
      not_for_roles user_roles do             
        clazz = options[:class] || 'special'
        area(:class => clazz, &block)
      end
    end
for users WITHOUT the given roles create a div area
 with optional class given in options hash and render block
 within this div