[gnome-flashback] bump version to 3.18.0, update NEWS

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 48fe4b5d53a476d3b4aa5c8a2ae9a01bf9515a4f
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Sep 25 00:30:45 2015 +0300

    bump version to 3.18.0, update NEWS

 NEWS         |   30 ++++++++++++++++++++++++++++++
 configure.ac |    4 ++--
 2 files changed, 32 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 0f30816..19e0741 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,35 @@
 Version 3.17.2
 ==============
+- Added bluetooth applet. (Alberts Muktupāvels, Balló György)
+- Added power applet. (Alberts Muktupāvels, Balló György)
+- Added autostart file for nm-applet. (Balló György)
+- Added autostart file for gnome-screensaver. (Alberts Muktupāvels)
+- Added custom menu directories. (Balló György)
+- Internationalization fixes. (Alberts Muktupāvels)
+- Ported away from gnome-common. (Alberts Muktupāvels)
+- Ported away from intltool, now upstream gettext is used. (Alberts Muktupāvels)
+- Small fixes to user visible strings. (Dmitry Shachnev, Piotr Drąg)
+- Added polkit, based on original PolicyKit-gnome. (Alberts Muktupāvels)
+- desktop-background: don't show in Ctrl-Alt-Tab switcher. (Alberts Muktupāvels)
+- display-config: randr 1.5 support, based on mutter. (Alberts Muktupāvels,
+  Dave Airlie)
+- display-config: Added underscan property, based on mutter. (Cosimo Cecchi)
+- display-config: other small fixes. (Alberts Muktupāvels, Matthias Clasen,
+  Rui Matos)
+- input-sources: initial version for input source switching. (Alberts
+  Muktupāvels, Sebastian Geiger)
+- polkit: use accountsservice to fetch user icon. (Marc Deslauriers)
+- sound-applet: allow to set volume more then 100%. (Alberts Muktupāvels)
+- sound-applet: fix voulume changing with mouse wheel. (Alberts Muktupāvels)
+- screenshot: finally screenshot taking is implemented, based on
+  gnome-screensaver. (Alberts Muktupāvels, Balló György)
+- Updated translations:
+  Balázs Úr (hu), Daniel Mustieles (es), Dimitris Spingos (el),
+  Dušan Kazik (sk), Gábor Kelemen (hu), Marek Černocký (cs), Piotr Drąg (pl),
+  Yosef Or Boczko (he).
+
+Version 3.17.2
+==============
 - workarounds: workaround for missing app menu button. (Alberts Muktupāvels)
 - workarounds: workaround for button-layout. (Alberts Muktupāvels)
 - display-config: allow loading from a system file. (Jasper St. Pierre)
diff --git a/configure.ac b/configure.ac
index de589c0..fdc2ded 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,8 +3,8 @@ dnl Define version info
 dnl **************************************************************************
 
 m4_define([gf_major_version], [3])
-m4_define([gf_minor_version], [17])
-m4_define([gf_micro_version], [2])
+m4_define([gf_minor_version], [18])
+m4_define([gf_micro_version], [0])
 m4_define([gf_version], [gf_major_version.gf_minor_version.gf_micro_version])
 
 dnl **************************************************************************