Bundle Python binary on Windows

Namecoin (specifically Electrum-NMC) currently requires Python 3.6+, which is not installed by default on Windows. We punt the issue in !39 by making the user install Python themselves, but this isn't great UX. We should look into bundling a Python 3.6+ binary with Tor Browser for Windows when building with Namecoin is enabled.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information