anchor.diff:  
   rem  Delete all the unpacked files
   
  +call :GDALadmin clean
  +
   for %%F in ("*.dll") do call :deleteFile "%%F"
   call :deleteFile README.txt
   
  
positive.code: goto :eof
  
  rem  ------------------------------------------------------------------------
  
negative.code: 
  echo Usage: %Script% [ACTION]
  echo where ACTION is:
  echo   get       -- download and unpack LSML and GDAL
  echo   clean     -- remove all unpacked files
  echo   distclean -- Same as "clean" action, plus remove all downloaded files
  echo   help      -- display this message (default)
  