Added a function for computing the Levenshtein string distance algorithm. I derived it from the pseudocode described in the Wikipedia article <http://en.wikipedia.org/wiki/Levenshtein_distance> so I think there should be no problem with copyrights, and anyway Dao is licensed under the GNU General Public License, so my Haskell rendition of the algorithm posted on Wikipedia is also in the public domain.
Added a function for computing the Levenshtein string distance
algorithm. I derived it from the pseudocode described in the Wikipedia
article <http://en.wikipedia.org/wiki/Levenshtein_distance> so I think
there should be no problem with copyrights, and anyway Dao is licensed
under the GNU General Public License, so my Haskell rendition of the
algorithm posted on Wikipedia is also in the public domain.

printedheart/Dao