Fixes D11 / 1c9efa6fb5.
The problem is that some GUI pages were simply named "page.xml" which
the regex didn't like.
Accepted By: Nescio
Differential Revision: https://code.wildfiregames.com/D3644
This was SVN commit r25022.
Thus fix lineendings in files that were missed in bcbf25bfbd, as
reported by Imarok.
(SVN throws an error when trying to set the native filending property on
a file with mixed fileendings. However when recursing it hides this
error).
This was SVN commit r18561.
Adds converted Relax NG XML grammars for each (Note: don't edit these
directly, modify the compact syntax .rnc files instead, then use a
conversion tool http://relaxng.org/#conversion to generate the .rng
files).
Adds Perl script to validate the XML files using the new grammars
This was SVN commit r15377.