Hi,
adding this Christmas theme is my first commit for kdegames (I have used my KDE svn account only for kst up to now), and I'm actually quite happy about it, as I've been working on that new theme with my 10-year old son. He's quite thrilled to make his first contribution to KDE - not bad at 10 :-)

I hope I haven't broken anything with this commit. The theme was actually ready in December (which would have fitted better for a Christmas theme!) but after some discussion on kdegames-devel it was decided not to include it to avoid upsetting translators. I've asked again recently and it seems it is OK to commit it now, so here it comes.

Some notes:
- I've used a .svgz format because those files can become pretty big otherwise (even though we've always tried to keep objects as simple as possible for performance reasons), and I was wondering whether we shouldn't do this for other themes as well for space/bandwidth reasons
- some things are not rendered as well by Qt as by inkscape, hopefully that gets improved at some point (but even so it is quite OK I think)
- among the recent themes, the pizzeria one seems to suffer from some drawing artefacts (at least here) and is also quite big. I don't know how much of an issue that is and whether it could be fixed easily, though.