Add support to build the introspection files for GdkWin32, as done recently
in the autotools builds and clean up the NMake Makefile for building the
introspection files a bit.
For some reason, gdk_win32_display_manager_get_type() was not exported in
gdk-3.0.lib, force its export, so that the GdkWin32-3.0.gir can be built
properly with the Visual C++ builds. This is a known problem that some
symbols in static libraries that are linked into a DLL in Visual C++, even
if they were marked with __declspec(dllexport) via _GDK_EXTERN.
Add a utility project to get config.h and gdkconfig.h from their *.h.win32
(or win32_broadway, if applicable) counterparts, using custom build rules,
so that these "generated" files can also be removed on clean and
"regenerated" upon update. This also enables the removal of configs in
certain projects that isn't really needed as a result.
Also update and merge the projects and property sheets to include a single
property sheet that it needs, which will then in turn include the other
property sheets that is needed, so that things are cleaner.
...for all files except the README.txt and the .sln files, which have to
have DOS/Windows line endings. This makes application of patches, when
applicable, easier.
Add the Visual Studio 2010 projects to build the GDK Broadway backend, just
like the Visual Studio 2008 project files in the last commit. Similarly,
split up the property sheets so that they are easier to maintain and can
be made more flexible for different build types. Also remove some unneeded
stuff from some of these items.
Also, fix the filter file completion for GTK, as a source file was excluded
for that and this was overlooked as it seemingly did not cause any trouble.
