Selftest hang on Windows

[Alexander Belchenko]

Selftest seems to hang on Windows after 343 test or so. How many tests 
in selftest?

I was fixing most of windows-related bugs, part of test I simply disable 
on windows because it's too linux-centric. Release 0.6 seems to be very 
windows-friendly, I think.

There is test.log of my windows selftest:

bzr binary                     E:\work\Python\bzr\bzr.dev-win\bzr

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~test_branch used to delete the stores, how is this meant to work ?
~~~~~~~~~~~~~~~~