winapi 0.4 tracking issue

[retep998]

• [ ] Upgrade minimum Rust version to 1.33
• [ ] Add #[repr(packed(N))] everywhere applicable.
• [ ] Add #[repr(align(N))] everywhere applicable.
• [ ] Use actual unions for unions.
• [ ] Use nested imports.
• [ ] Upgrade to 2018 edition.
• [ ] Merge any pull requests that have breaking changes.
• [ ] Switch to FlexibleArray.
  • Due to needing to preserve the distinction between [T;0] and [T; 1], it may be better to just tell people to use VariableSizedBox.
• [ ] Fix any deprecation warnings.
• [ ] Replace macro functions with actual const functions.
• [ ] Figure out better way to define strings.
• [ ] Get rustfmt working maybe

[euclio]

Would you accept PRs tackling these issues against the dev branch?

[retep998]

The dev branch is where I write my own commits for testing on CI before merging them into a mainline branch. I'll eventually create a 0.4 branch where 0.4 specific changes can be directed.