Message 46222 - Python tracker

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user_id=29957

Argh. Our Makefile's ability to Do The Right Thing... is not
good. Rebuilding Lib/symbol.py and Lib/token.py makes this
better. The setup.py really should do this automatically.

So - all tests pass. As far as I can see, things still to be
done for this to be in a2:

- Documentation (can wait until a3, I guess)
- More coverage in test_decorator (ditto)