Log Message:
Update textproc/p5-XML-Atom to 0.31; changes since 0.29 include:

0.31  2008.11.13
    * Update Content-Type in XML::Atom::Client when the entity's version >= 1.0
      (Thanks to David Steinbrunner RT 39801)

0.30  2008.11.12
    * hopefully fix a bug where xml:base returns an empty string
      e.g. http://www.nntp.perl.org/group/perl.cpan.testers/2008/11/msg2595696.html
      (Thanks to tokuhirom http://d.hatena.ne.jp/tokuhirom/20081110/1226280757)