-removed headers that ceased to exist
-bump API version
-made up for new headers that is to be installed
-gtk-demo program and related sources/data copied to bin/gtk3-demo
-Made up for the additional dependencies for setups other than Debug|Win32 (the correct setting)
-Made Subsystem="1" for all setups like Debug|Win32 (the correct setting)
-Removed the GdkPixbuf stuff as it is now in a package of its own and added
it as a dependent library here
-Made up for the headers missed in the installation stage for GTK+/GDK