gtkmm 3.6.0 windows 32 bit build WIP (official gtk bundle 3.6.4 20130921)

[Giuseppe Penone <giuspen gmail com>]

I successfully built on windows, based on gtk+-bundle_3.6.4-20130921_win32.zip

the following stack:

- libsigc++-2.2.11
- glibmm-2.34.1 (with one patch: the function content_type_get_symbolic_icon between #ifdef G_OS_UNIX ... #endif according to the mail https://mail.gnome.org/archives/commits-list/2012-September/msg08990.html)
- atkmm-2.22.6
- cairomm-1.10.0
- pangomm-2.28.4
- gtkmm-3.6.0

I used mingw32 on windows XP, the build completed without errors but some .dll seems to be missing so I will continue as soon as I have some more time.

If anybody has time and wants to continue from this result I can share in more detail the procedure/scripts that I'm using.

Greetings,

Giuseppe.