[IronPython] IronPython 1.0 Beta 5 on Mono

[Sanghyeon Seo]

The binary will start up fine with Mono 1.1.13.4 release.

You can't import os module, because Mono's
System.Environment.SetEnvironmentVariable method is a stub that will
raise NotImplementedException every time, but IronPython now makes use
of this method. Implementing this apparently involves P/Invoke
machinery, so I'm afraid I can't fix this myself:
http://svn.myrealbox.com/source/trunk/mcs/class/corlib/System/Environment.cs

I will report more as I experiment.

Seo Sanghyeon