[gtkmm] Prepare NEWS

[Murray Cumming <murrayc src gnome org>]

commit e9c7af9b7ce2482863f681da89f0c49086fa118a
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Sep 25 23:20:12 2012 +0200

    Prepare NEWS

 NEWS |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index e4ca156..7948483 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+3.5.13 (unstable):
+
+Gtk:
+* ApplicationWindow: Add get_id().
+* Container: Add forall(), propagate_draw(),
+  get_focus_child() and get_path_for_child().
+* IconView: Add get_item_row() and get_item_column()
+  and reorderable, tooltip-column and item-padding properties.
+* LevelBar: Added properties and signal.
+* PrintJob: Added get/set_page_ranges().
+* Settings: Added the enable_primary_paste property.
+* Widget: Add has_visible_focus().
+* Window: Add set_startup_id(), is_active(), 
+  has_toplevel_focus(), set_default_geometry(), 
+  resize_to_geometry(), has_group().
+  Add the focus-visible and attached-to properties.
+  (Murray Cumming)
+
+Build:
+* Use std::time_t instead of ::time_t.
+* Use std::size_t and std::ptrdiff_t.
+  (Kjell Ahlstedt)
+
 3.5.12 (unstable):
 
 Gtk: