2.91.4 (unstable):

Gtk:
* Dialog: get_vbox(): Return a Box instead of a VBox.
* Added Grid container.
  (Murray Cumming)
* Style: Fixed the clone_vfunc() implementation's reference-counting.
  (José Alburquerque)
* Widget: Removed the deprecated size-request signal.
  (Murray Cumming)

Build:
* Fix the refcount-debug-warnings build.
  (Krzesimir Nowak)
* Windows Installer:
  - Make sure libintl-8.dll gets cleaned up correctly on uninstall.
  - Add the lib\cairomm-1.0 directory to the installed files.
  (Armin Burgmeier)