Provides missing Win32 API

#2Reexport from Win32 if using version 2.5.0.0 or later

As of Win32-2.5.0.0, Win32 now includes everything that is currently in Win32. See http://hackage.haskell.org/package/Win32-2.5.0.0/changelog .

This library should simply reexport contents from Win32 if built against Win32-2.5.0.0 or later.