Windows installer, reflecting changes that went into a replacement 2.0b1

Windows installer, reflecting changes that went into a replacement 2.0b1
.exe that will show up on PythonLabs.com later today:
    Include the Lib\xml\ package (directory + subdirectories).
    Include the Lib\lib-old\ directory.
    Include the Lib\test\*.xml test cases (well, just one now).
    Remove the redundant install of Lib\*.py (looks like a stray duplicate
        line that's been there a long time).  Because of this, the new
        installer is a little smaller despite having more stuff in it.