[docs] [issue12779] Update packaging documentation

[Alexis Metaireau]

Alexis Metaireau <alexis at notmyidea.org> added the comment:

I think it could be helpful to have this work at least somewhere so we can work on top of it. For instance if someone wants to do changes in the documentation, then only thing it would do now would be to cause potential merge conflicts.

I'm okay to have several commits for this, as it would allow us to work on the documentation with more than one person (theoretically at least).

Plus I really want to see those changes!

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12779>
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