[issue30450] Pull Windows dependencies from GitHub rather than svn.python.org

[Steve Dower]

Steve Dower added the comment:

Yeouch, it's been causing AppVeyor builds to get stuck, and then they time out after an hour.

Luckily mine is up next in a minute or so, so I'll try to merge quickly and avoid anyone else getting held up.

I also restored HOST_PYTHON in the PR, as a fallback for "where do I find a python.exe I can download stuff with" - specific version doesn't matter, as long as it has requests or urlretrieve.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30450>
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