This adds a PlatformToolset tag in the project configs so that we can
provide support for Visual Studio 2012 with relative ease as the format
of the VS 2012 projects are only slightly different from their VS 2010
counterparts.
We can then use a script like the one used in GLib[1] to copy the VS2010
projects and replace the necessary tags to create the VS2012 projects.
This also cleans up the projects and property sheets, as there were some
unwanted/unneeded entries in them.
[1]: http://git.gnome.org/browse/glib/commit/?id=76cecf061b377d30e5422cdddb1fb9d19c52421d
-Turn on Whole Program Optimization for all Release builds.
-Disable Incremental Linking for all Release builds.
-Use MultiByte character set for all configurations for consistency.
-Remove unneeded tags from projects
-Seperate intermediate directories for projects to avoid rebuilding/
linking on every rebuild and MSBuild errors (et al.) for not being
able to write into build log files as they are in use.
These are the VS2010 Project files to compile GDK and GTK+, using
the Win32 backend, along with a brief README.txt explaining the
process.
The GDK and GTK project/filter files are templates that are filled
in during "make dist" with up-to-date source file listings as far
as possible, to simplify maintenance.
Comments on their usage are most welcome.
