[IronPython] Bugs: os.environ and os.path.exists/os.stat

[Neville Bagnall]

I've found these two cases of incorrect behaviour with Beta 3.

os.environ is not populated:

>>> import nt
>>> nt.environ
Traceback (most recent call last):
   File , line 0, in input##414
AttributeError: 'module' object has no attribute 'environ'
>>> import os
>>> os.environ
{}

os.stat returns fails to raise an exception for non-existent files,  
consequently os.path.exists always return True:

>>> import System.IO
>>> System.IO.Directory.Exists('c:/path')
False
>>> System.IO.Directory.GetCreationTime('c:/path')
01/01/1601 00:00:00
>>> import os
>>> os.path.exists('c:/path')
True

Regards,
Neville.