Visual Studio 2008 is still supported by "9.sln" projects and
".vcproj" files, while ".sln" and ".vcxproj" work for 2010, 2012,
and 2013. The "build.bat" script detects which version of
Visual Studio is active and uses the appropriate ".sln" files.
The bad news is that we have two copies of each project until we
decide to drop support for Visual Studio 2008. (We had two copies
before, but one copy was unmaintained.) The good news is that
we have only 2 copies of each project, because recent versions of
Visual Studio are willing to use 2010 projects as-is.
Change project and related files to text instead of always CRLF,
because that seems to be ok for modern Windows tools.
original commit: aa487175adadeab02177bfab2564f63f29bea334
112b51dac3