[gnome-shell] Created tag 3.18.5

[Florian Müllner <fmuellner src gnome org>]

The unsigned tag '3.18.5' was created.

Tagger: Florian Müllner <fmuellner gnome org>
Date: Thu Apr 21 12:28:10 2016 +0200

    Tag release 3.18.5

Changes since the last tag '3.18.4':

Aaron Plattner (1):
      st: Fix offscreen leak if cogl_framebuffer_allocate fails

Christophe Fergeau (1):
      NetworkAgent: Fix double-unref in get_secrets_keyring_cb()

Florian Müllner (5):
      telepathyClient: Acknowledge messages before closing
      st: Do not try to unref NULL CoglObjects
      Do not skip CoglError parameters
      st: Don't assert when corner texture creation fails
      Bump version to 3.18.5

Marek Černocký (1):
      Updated Czech translation

Matej Urbančič (1):
      Updated Slovenian translation