[gtkmm] Created tag 2.23.91

[murrayc src gnome org]

The unsigned tag '2.23.91' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Wed Feb 2 11:23:31 2011 +0100

    2.23.91

Changes since the last tag '2.23.90':

Murray Cumming (14):
      Range: Added get/set_round_digits() and property.
      ComboBoxText: Make the API for like the one in gtkmm 3.
      Allow discovery of the installed m4 files.
      Fix the ChangeLog
      ComboBox: Make the API more like the one in gtkmm 3.
      Documentation: Remove : from deprecation documentation.
      Regenerated the XML files for the C API documentation.
      Gdk::Image: Added get_pixel().
      Make sure that all deprecated API is in an ifdef.
      ComboEntryText: Add append(), prepend() and insert().
      Pixbuf: Minor documentation improvement.
      Image: Added constructor and a const-correct set(IconSet, size) method.
      Button: undeprecated the clicked() method.
      2.23.91