New recipe for installing HTML entity catalogs

Hi Rune,

For AT-292, I've just added a new recipe to our Chef cookbook called "htmlentities", which downloads these sets of standard XHTML entities from the W3C site:

http://www.w3.org/TR/xhtml1/DTD/xhtml-lat1.ent
http://www.w3.org/TR/xhtml1/DTD/xhtml-special.ent
http://www.w3.org/TR/xhtml1/DTD/xhtml-symbol.ent

And installs them where they need to go on the worker machine (/etc/xml). I tested locally, and it worked as expected, but could you take a look and make sure I configured the recipes correctly?

Thanks very much,
Sanders