[metacity/gnome-3-18] bump version to 3.18.3, update NEWS

[Alberts Muktupāvels <muktupavels src gnome org>]

commit c938a9cff9c33954b3c5f1f8400d31f6a0e06f26
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Mar 30 01:04:46 2016 +0300

    bump version to 3.18.3, update NEWS

 NEWS         |    6 ++++++
 configure.ac |    2 +-
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 520bf62..53352c7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+Version 3.18.3
+- Add Icon=preferences-system-windows in metacity.destkop. (Alberts Muktupāvels)
+- Scale window decorations on HiDPI displays, based on mutter. (Alberts
+  Muktupāvels, Florian Müllner, Iain Lane)
+- Partially revert "build everything as library". (Alberts Muktupāvels)
+
 Version 3.18.2
 ==============
 - Fix a segfault in metacity-theme-viewer. (Alberts Muktupāvels)
diff --git a/configure.ac b/configure.ac
index c27577a..cad7029 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ dnl **************************************************************************
 
 m4_define([m_major_version], [3])
 m4_define([m_minor_version], [18])
-m4_define([m_micro_version], [2])
+m4_define([m_micro_version], [3])
 m4_define([m_version], [m_major_version.m_minor_version.m_micro_version])
 
 dnl **************************************************************************