[gtkmm-documentation] Created tag 2.23.0

[murrayc src gnome org]

The unsigned tag '2.23.0' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Wed Feb 2 11:59:13 2011 +0100

    2.23.0

Changes since the last tag '2.22.0':

Kjell Ahlstedt (2):
      Modified the clipboard/ideal example
      Modified the custom_widget example

Murray Cumming (9):
      Remove credits mention for removed MSVC 2005 Express section.
      Label section: Fix a /<b> -> </b> typo.
      Fix minor typos
      Updated ChangeLog
      Fix the build with --enable-warnings=fatal.
      Adapt to removal of the Gtk::Range update_policy.
      Adapt to append_text()->append() deprecation in ListViewText.
      Disable the gdk drawing example, because it uses deprecated API.
      Remove the Ruler examples.