gtk-2-24-win32 branch merged into gtk-2-24

[Alexander Larsson <alexl redhat com>]

The -win32 branch is now in a pretty good state and seems to be the best
Gtk 2.x version for win32 so far, so I just merged it into gtk-2-24, and
I plan to do a release later this week.

The latest code also includes a bunch of Quartz fixes, so this will end
up being a pretty sweet cross platform release.

So, this is a last call for any regressions vs earlier win32 releases
before doing the new release.