#6 Update ArtificialAnt code

Similar to the documentation (http://sourceforge.net/tracker/
index.php?
func=detail&aid=1223644&group_id=140347&atid=745927),
the code was also written rather quickly. This may be
updated as new versions of the ArtificialAnt problem are
added (see http://sourceforge.net/tracker/index.php?
func=detail&aid=1223634&group_id=140347&atid=745927),
or as a stand-alone item.