[atkmm] Created tag 2.25.2

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.25.2' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Thu Mar 30 22:08:30 2017 +0200

    2.25.2

Changes since the last tag '2.25.1':

Chun-wei Fan (3):
      Visual Studio builds: "Install" the .pdb files
      Visual Studio builds: Require Visual Studio 2017
      Fix previous commit

Murray Cumming (6):
      C++11: Use of nullptr.
      C++11: Use of auto.
      Text, EditableText: Use vector instead of SListHandle<>.
      Replace remaining uses of Glib::ArrayHandle<> with vector.
      Use glibmm-2.54 instead of glibmm-2.52
      2.25.2