Log Message:
Update p5-XML-TreePP to 0.41.

Changes from previous:
----------------------
2010/10/31 (0.41)
    * require_xml_decl option added. thanks to nicomen
      https://rt.cpan.org/Ticket/Display.html?id=42441
    * empty element when #text node is undef
      http://www.kawa.net/works/perl/treepp/treepp.html#com-2009-07-23T16:38:09Z

2009/11/21 (0.40)
    * pod typo fix: (thanks to jkutej)
      http://annocpan.org/~KAWASAKI/XML-TreePP-0.39/lib/XML/TreePP.pm#note_2382