2008-07-14 <pj@csee.ltu.se> * Version 0.22, adapted for Hugs 20060908 and ghc 6.8.2. 2005-07-09 <magnus@cse.ogi.edu> * Version 0.21, adapted for Hugs 20050308 and ghc 6.4, by Andrew Pimlott <andrew@pimlott.net>. 2002-03-18 <magnus@cse.ogi.edu> * Version 0.2, public release.