ANNOUNCE: gtkmm 2.13.4

*** gtkmm 2.14:

gtkmm 2.13 wraps new API in GTK+ 2.13. It will become the API/ABI-stable 
gtkmm 2.14 when GTK+ 2.14.0 is released. gtkmm 2.13 is API/ABI-compatibile with 
gtkmm 2.12, 2.10, 2.8, 2.6 and 2.4. It is a version of the gtkmm-2.4 API.

gtkmm stays in-sync with GTK+ by following the official GNOME release schedule:
http://www.gnome.org/start/unstable/

Bindings for the rest of the GNOME Platform are also available, and are also 
API-stable.

http://www.gtkmm.org

*** Changes

gtkmm 2.13.4 (unstable);

Gtk:
* Added the ToolShell interface, though it is not used yet, 
  to avoid breaking ABI.
* AccelGroup: Added get_is_locked() and  get_modifier_mask().
* CellRendererPixbuf: Added gicon property.
* Clipboard: Added request_uris(), wait_for_uris(), 
  wait_is_uris_available().
* Entry: Added get/set_overwrite_mode().
  Added overwrite_mode and text_length properties.
* Dialog: Reimplemented get_action_area() and 
  get_content_area() with the new accessor functions.
* Entry: Reimplemented get_text_length() with the new accessor