Log Message:
Update 0.623 to 0.625
---------------------
0.625 Thu 05 Jun 2014 23:55:42 +1000    <joe@kafsemo.org>
        - Allow xml-model processing instructions (#94078).
        - Don't warn when undef is passed to setOutput (#94369).

0.624 Wed Feb 12 23:28:39 2014 +1100    <joe@kafsemo.org>
        - Allow an empty system ID in a doctype declaration.