--- v1.06  24 May 1992 
      * improved graphics
      * optional continuation of game, for higher scores
      * sound effects
      * allow rotation of map -- alt-K and alt-L
      * you can now store your name in the hof -- so several people can 
            watch scores
      * fixed minor graphics glitches 
--- v1.04  9 Apr 1992
      * softex version
      * reduce cost of creating rubble: from 4000 to 400
--- v1.02  30 Mar 1992 
      * fix bug when planter turns to paver