rnd-20100309-1-src

rnd-20100309-1-src
* added (hidden) function to save native Supaplex levels with tape as
  native *.sp file containing level with demo (saved with a file name
  similar to native R'n'D levels, but with ".sp" extension instead of
  ".level"); to use this functionality, enter ":save-native-level" or
  ":snl" from the main menu with the native Supaplex level loaded and
  the appropriate tape loaded to the tape recorder
* added updating of game values on the panel to Supaplex game engine