[Distutils] distlib, pylauncher -> PyPA

[Vinay Sajip]

I'm trying to move the distlib and pylauncher repositories to the PyPA
account on BitBucket. I'm getting Internal Server Errors with both repos and
have logged an issue on BitBucket. This is just to let you know that the
transfer will hopefully happen soon, so some BitBucket links might not work
during the transition.

Regards,

Vinay Sajip