[iagno] Created tag 3.18.1

[Arnaud Bonatti <arnaudb src gnome org>]

The unsigned tag '3.18.1' was created.

Tagger: Arnaud Bonatti <arnaud bonatti gmail com>
Date: Mon Oct 12 19:23:18 2015 +0200

    3.18.1.

Changes since the last tag '3.18.0':

Arnaud Bonatti (1):
      Prepare 3.18.1.

Michael Catanzaro (2):
      Display a real error message when sound playback fails
      Get rid of extra newline in error message

Марко Костић (1):
      Updated Serbian translation

Милош Поповић (1):
      Updated Serbian Latin translation