#115 Perform pre-release tests on windows 2000 and XP

[Age Mooy]

Karma contains some OS-specific code that needs to be
tested on all target platforms, including windows 2000
and XP.

One example of OS-specific code is the
MyFileUtils.makeWriteable() method in toolforge-core.
This method uses Runtime.exec() to call native OS
commands to remove the read-only atribute from module
files.