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.
Updates to the Visual Studio 2010 projects will follow later.
...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 Visual Studio 2008 projects and pre-configured gdkconfig.h for
Broadway builds
-Decouple the Visual Studio property sheets, to simplify maintenance and
enhance flexibility for different builds
Visual Studio 2010 projects updates will follow later.
