Updated to 0.13

Changes:
0.13  Fri Mar 30 21:17:18 GMT 2012
  - read: don't call close() at DESTROY time when the file handle
    creationfailed during new() (Murali Ramanathan)
      https://rt.cpan.org/Ticket/Display.html?id=71462
  - apply patch to allow read/write of files from handle
      https://rt.cpan.org/Ticket/Display.html?id=71715
  - fix problem with $^X under mod_perl (thanks, mario and david!)
      https://rt.cpan.org/Ticket/Display.html?id=62060
  - fix bug in perldoc (Sergei Steshenko)
      https://rt.cpan.org/Ticket/Display.html?id=57114
  - fix problem with writing 24,32 bps files reported by Sergei Steshenko:
      http://rt.cpan.org/Public/Bug/Display.html?id=57093
  - spelling fixes from debian
      http://rt.cpan.org/Public/Bug/Display.html?id=69644

(rhaen)