[gnome-session] Created tag 3.18.0

[Ray Strode <halfline src gnome org>]

The unsigned tag '3.18.0' was created.

Tagger: Ray Strode <rstrode redhat com>
Date: Mon Sep 21 10:35:48 2015 -0400

    Version 3.18.0
    
    * Bump version

Changes since the last tag '3.16.0':

Akom Chotiphantawanon (1):
      Updated Thai translation

Arash Mousavi (1):
      Updated Persian translation

Cédric Valmary (1):
      Updated Occitan translation

Daniel Șerbănescu (1):
      Updated Romanian Translation

Fabio Tomat (1):
      Updated Friulian translation

Hajime Taira (1):
      l10n: Update Japanese translation

Hannie Dumoleyn (1):
      Updated Dutch translation Master 3.18

Jakub Steiner (1):
      icon: provide a symbolic variant of the app icon

Pedro Albuquerque (2):
      Updated Portuguese translation
      Updated Portuguese translation

Piotr Drąg (1):
      Updated Polish translation

Ray Strode (3):
      gsm-util: save environment to $XDG_RUNTIME_DIR/gnome/environment
      NEWS: update for release
      configure: bump to 3.17.92

laurent Soleil (1):
      Updated Occitan translation