#1 omniORBpy/README.Python update

[Mark Hammond]

The Python license "warning" should be updated. I came
up with:

Versions of Python up to and including 1.5.2 had a very
simple and liberal license; versions from 1.6 to 2.0
had much more complex and more restrictive licenses.
Version 2.1 and later is licensed under a PSF license
(http://www.python.org/psf/) which has been OSI
certified and declared GNU compatible.

[Mark Hammond]

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To be clear, I am not proposing the last para ("To avoid any
doubt,...") be removed.