18Oct2006  Greg Buchholz <greg@sleepingsquirrel.org>

  * DepthFirstSearch.hs : Changed from using the ST module to Control.Monad.ST
                          and Data.Array.ST
  * Infer2.hs : Modified to use Data.Map instead of deprecated Date.FiniteMap
  * Toplevel.hs : Modified to use Data.Map 
  * Makefile : Get rid of ghc-6.4 specific "-package lang", let "-make"
               figure it out for us.