[Python-3000] New io system and binary data

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    Guido> You can repeat that until you're blue in the face but it's not
    Guido> going to change. Way more programs (especially simple ones) deal
    Guido> with txet than with binary data.

For us Unix-heads the notion that a file is anything other than a stream of
bytes is rather foreign.  I understand that to a large degree if you made
the world right for us the tail would be wagging the dog.

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