Changes in 3.0.0:
Emin Tufan Çetin
       Update Turkish translation
Efstathios Iosifidis
       Add Greek translation
Milo Ivir
       Update Croatian translation
Andre Klapper
       Replace git.gnome.org by Gitlab URL in <GitRepository> in DOAP file
       Replace Bugzilla by Gitlab URL in DOAP file
Марко Костић
       Add Serbian translation
Ask Hjorth Larsen
       Updated Danish translation
John Ralls
       Update library version in consideration of API changes. (HEAD -> master)
       Msgmerge updated potfile.
       Clean up documentation so that gtk-docs check passes.
       Remove PyGtk support.
       Use AM_GNU_GETTEXT_REQUIRE_VERSION instead of AM_GNU_GETTEXT_VERSION
       Remove the Carbon-based gtk-mac-menu/gtk-mac-dock/gtk-mac-bundle.
       Update AM_GNU_GETTEXT_VERSION to match gtk-osx installed gettext.
       Use __LP64__ instead of __x86_64__ to detect 64-bit builds.
DaeHyun Sung
       Update Korean translation
Fabio Tomat
       Add Friulian translation
Matej Urbančič
       Add Slovenian translation (gnome/master)
Goran Vidović
       Add Croatian translation
Balázs Úr
       Update Hungarian translation