Re: Issue 590 in robotframework: Document that `PYTHONCASEOK` environment variable should not be set

[robotframework]

Updates:
        Labels: -Target-2.5.1 Target-2.6

Comment #1 on issue 590 by pekka.klarck: Document that `PYTHONCASEOK`  
environment variable should not be set
http://code.google.com/p/robotframework/issues/detail?id=590
We want to get RF 2.5.1 out today and this isn't absolutely needed for it.  
Instead, or in addition to, documenting this we could change the installer  
to stop if PYTHONCASEOK is set.