Certificates for Windows

[Lukasa]

In tls.py we use SSLContext.set_default_verify_paths() to get the system certificate bundle. This works fine on my OS X development box, but leads to cert verification errors on Windows.

Options are either to use a Windows-specific version as well that we know will work, or to start bundling requests' CAcerts.

[Lukasa]

Ok, I've fixed this by using the same certificate package as Requests uses. @kennethreitz, are you ok with cross-project use like this? I'm grabbing it from your CI server. If you aren't happy, let me know and I'll work out an alternative.

In the meantime, closing.

[kennethreitz]

By all means! Ideally, I'd like to have a more proper domain/project setup for this. I'll get around to that eventually in conjunction with @dstufft :)

In the meantime, just grab away, or depend on certifi :)

[Lukasa]

@kennethreitz Awesome, thanks! =) If you ever need a hand sorting that out, I've got a barely-used Digital Ocean server that I'm happy to devote to the cause.