[Python-Dev] python 2 for building python 3

["Martin v. Löwis"]

> 1. Parts of the Makefile that use Python checked if Python is installed
> and generate a useful error if not.
> 2. All Python scripts that are part of the build should be 2-vs-3
> version agnostic for the time being (= until Python 2 is distant
> history, which won't happen soon)

I think this is asked too much, unless you want to also contribute
code for that (which I really consider unnecessary). Users who build
from the source repository just need to get their build environment
right.

It's unfortunate that subversion doesn't provide relative ordering of
files after an update, perhaps Mercurial is better with that. For a
release, the time stamps in the tar file will do fine.

Regards,
Martin