Update Pod-Simple to CPAN version 3.31

Update Pod-Simple to CPAN version 3.31

  [DELTA]

2015-08-23   Marc Green <marcgreen@cpan.org>
  * Release 3.31
  No changes since 3.30_1.

2015-07-19   Marc Green <marcgreen@cpan.org>
  * Release 3.30_1
  Simplified the detection of case-insensitivity in Pod::Simple::Search.

  Fixed "Use of uninitialized value $1 in lc" warning in
  Pod::Simple::Search.

  If @INC includes the current directory symbol, '.', the survey()
  method of Pod::Simple::Search no longer excludes it from its list
  of directories to search. Instead, The survey() and find() methods
  now both exclude duplicate directories from @INC (RT #102344).

  Moved source repository and updated links to new perl-pod GitHub
  organization: https://github.com/perl-pod/pod-simple.

  Improved repository links and added GitHub issue tracking link to
  the distribution metadata.

  Switched from File::Spec's catdir to catfile for path names, to
  fix failures on VMS. Also now use Unix path semantics where
  they're not required to be platform-specific. Thanks to Craig A.
  Berry for the patch (RT #105511).

  Improved the example use of the 'html_encode_chars()' method in
  the Pod::Simple::XHTML documentation. Patch from Randy Stauner.