Check and update the build (and packaging) instructions.
- Identify places where there exist any build instructions or related information (including README files, wiki)
- Remove outdated information
- Update if needed
Things to note:
- The current compiler of choice on Windows is (probably) mingw-w64 5.4 by mingw-builds.
- I would prefer to outline the steps for different platforms separately. Having them interleaved with each other seems a bit confusing, and harder to follow.
- Should MSVC even be mentioned at all?