Add Cataclysm

Formula for Cataclysm. They don't seem to have version numbers or source code packages. Yesterday they had an official release which you can see here (but no Mac build):

http://www.cataclysm.glyphgryph.com/smf/index.php?topic=261.0

The link they gave to the source code is just to the constantly changing head of the master branch on github. No other tags or branches exist.

I decided to link to the github zip archive from the last commit before that official release, and to name the version 24-02-2013 since they call it the "24 February Release". Hope that's ok, if not let me know.