Visual Studio figured out variadic macros around 2005, so we can
finally replace the explicit-arg-count debug log macros.
Also, fixed some include guards.
Also, bumped version to 4.0.0d1.
This updates all source files to use spaces instead of tabs for
indentation. It also normalizes the end-of-line markers to be
Windows-style CRLF, and ensures that all files end with EOL.
No substantive changes were made; "diff -w" is empty.