Fix Windows Setup Script

[calebcartwright]

Environment Details

• Operating System
  • Linux
  • Mac
  • Windows
• Rust Version: n/a
• Rust Release Channel
  • Stable
  • Nightly
  • Beta
• Cargo Version: n/a
• rusty-hook Version: n/a

Description

The dev setup script on Windows is not working well, even after the fix attempt in #20/#26.

The detection of the VC build tools is not reliable, and there's issues with certain steps when the script is running behind a proxy

[calebcartwright]

Working fine now in proxy-free environments. I'm debating how much time I should invest into attempting to make this script proxy proof, although having to tried to set this up myself on a Windows machine behind a proxy... I'd love to see it working.