Don't forget version at the end of setup.py, write it only if changed. This fixes issue159: "python setup.py install" shouldn't write new files in the working dir if one has done "python setup.py build" first.

adding a
adding b
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NONEXISTENT: No such file or directory
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a: No such file or directory
NONEXISTENT: No such file or directory
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NONEXISTENT: No such file in rev 14467d15ef43
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