[Distutils] setuptools develop command garbles binary files specified as scripts setup() parameter on windows

[David Genest]

> For the record, the current draft of the python.commands extension in PEP 459 does indeed include support for reporting prebuilt 
> commands: http://www.python.org/dev/peps/pep-0459/#the-python-commands-extension
> The draft metadata extensions haven't really been properly reviewed yet, though. For pip 1.6, Donald and I have been focused on 
> hammering PEP 440 into shape.

I agree that this would help, and in fact solve the problem. But only in newer python releases.