[gtkmm-documentation] Created tag 3.24.0

[Kjell Ahlstedt <kjellahl src gnome org>]

The unsigned tag '3.24.0' was created.

Tagger: Kjell Ahlstedt <kjellahlstedt gmail com>
Date: 1541775022 +0100

    3.24.0

Changes since the last tag '3.22.1':

Daniel Boles (1):
      Document the new make_managed() & prefer to use it

Kjell Ahlstedt (7):
      Add Gtk::FileChooserNative example
      Merge branch 'wip/dboles/make_managed-3' into 'gtkmm-3-24'
      Avoid '<' and '>' in code snippets in the docbook file
      Create only .tar.xz tarballs
      Replace most Gtk::manage() calls with Gtk::make_managed()
      Require gtkmm-3.0 >= 3.24.0 and link to gtkmm 3.24
      3.24.0