[metacity] Created tag 3.18.6

[Alberts Muktupāvels <muktupavels src gnome org>]

The unsigned tag '3.18.6' was created.

Tagger: Alberts Muktupāvels <alberts muktupavels gmail com>
Date: Tue Jul 12 23:33:09 2016 +0300

    Tag release 3.18.6

Changes since the last tag '3.18.5':

Alberts Muktupāvels (6):
      frames: restore window resize using titlebar
      constraints: validate fullscreen monitors before using them
      theme: use cairo to render gradient
      theme: fix 'use cairo to render gradient' commit
      theme: fix gradients
      bump version to 3.18.6, update NEWS

Giovanni Campagna (1):
      don't show the resize popup for 2 x 2 size increments