Update to 5.4

Upstream changes:
Thu May 29 2014  Jeff Fearn <Jeff.Fearn@gmail.com>
  Release 5.4
  Do not escape CDATA content.

Tue May 27 2014  Jeff Fearn <Jeff.Fearn@gmail.com>
  Release 5.3
  Fix CDATA not being printed properly by as_XML. RT #95970
  Fix Devel::Cover declared as build_requires but not used RT #93155
  Fix XML::Catalog version number mismatch. RT #93154

Mon Dec 9 2013 Jeff Fearn <Jeff.Fearn@gmail.com>
  Release 5.2

  Fix local path resolution. RT #90464

(wen)