[gtkmm] Created tag 2.21.1

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.21.1' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Wed Jun 23 09:56:46 2010 +0200

    2.21.1

Changes since the last tag '2.20.3':

Daniel Elstner (1):
      Split off atkmm into its own separate module

Murray Cumming (5):
      Mark the branch in the ChangeLog
      Mark the branch in the ChangeLog
      Remove the ifdefs that supported building with optional API.
      Added Assistant::commit() and Entry::reset_im_context().
      Entry: Added im_context_filter_keypress().

Yaakov Selkowitz (1):
      Do not install gtkmm-demo data