def list(kind=:bullets)
        node = ListNode.new(self)
        yield node.list(kind)
        self.store(node)
      end
def list(kind=:bullets)
        node = ListNode.new(self)
        yield node.list(kind)
        self.store(node)
      end
This method provides a short cut means of creating a new ordered or
 unordered list. The method requires a block that will be passed a
 single parameter that'll be a reference to the first level of the
 list. See the +ListLevelNode+ doc for more information.

 Example usage:

   rtf.list do |level1|
     level1.item do |li|
       li << 'some text'
       li.apply(some_style) {|x| x << 'some styled text'}
     end

     level1.list(:decimal) do |level2|
       level2.item {|li| li << 'some other text in a decimal list'}
       level2.item {|li| li << 'and here we go'}
     end
   end