[nautilus] Created tag 3.18.3

[Gitlab System User <gitlab src gnome org>]

The signed tag '3.18.3' was created.

Tagger: Carlos Soriano <csoriano gnome org>
Date: 1450119256 +0100

    tag for 3.18.3

Changes since the last tag '3.18.2':

Carlos Soriano (21):
      NEWS: fix versioning
      configure: bump gtk min version
      file: fix wrong date calculation
      files-view: better memory management for widgets
      files-view: unref action group
      files-view: don't hold a ref to the view on templates items
      file: fix previous commit
      nautilus-application: unset slot if new window created
      mime-actions: use explicit slot for opening locations
      window-slot: don't increase references on dispose...
      window-slot: use nautilus ref counting
      nautilus-places-view: fix leak
      directory: implement dump
      window: use nautilus_file_unref
      window-slot: plug leak when no regular file
      window-slot: invalidate file attributes on reload
      toolbar: remove some tabs
      toolbar: remove obsolete comment
      files-view: fix formatting
      directory-async: set NULL the count progress on cancel
      release: prepare 3.18.3

Cosimo Cecchi (2):
      mime-actions: check for name owner for PackageKit
      mime-actions: fix double free in error path

Dz Chen (1):
      update zh_CN translation

Iain Lane (1):
      canvas-container: consider margins when calculating icon bounding box

Sebastien Bacher (1):
      Don't trigger an int overflow on files' age computation

YunQiang Su (1):
      Us ... instead of …  for zh_CN

Марко Костић (1):
      Updated Serbian translation