[notification-daemon] bump version to 3.20.0, update NEWS

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 1c5edb95ee22b0f80338dffed550b6587c9bdf8e
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Apr 3 15:52:13 2016 +0300

    bump version to 3.20.0, update NEWS

 NEWS         |   10 ++++++++++
 configure.ac |    4 ++--
 2 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 9b4d731..9eec74f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+Version 3.20.0
+==============
+- Remove GNOME-Flashback autostart file. (Alberts Muktupāvels)
+- Stop using deprecated GdkDeviceManager. (Alberts Muktupāvels)
+- Updated translations:
+  Anders Jonsson (sv), Andika Triwidada (id), Aurimas Černius (it),
+  Claude Paroz (fr), Dušan Kazik (sk), Marek Černocký (cs),
+  Mario Blättermann (de), Milo Casagrande (it), Мирослав Николић (sr, sr latin),
+  Pedro Albuquerque (pt), Rafael Fontenelle (pt_BR).
+
 Version 3.18.1
 ==============
 - Fix empty body text with invalid pango markup.
diff --git a/configure.ac b/configure.ac
index 93922a2..b2c0519 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,8 +3,8 @@ dnl Define version info
 dnl **************************************************************************
 
 m4_define([nd_major_version], [3])
-m4_define([nd_minor_version], [19])
-m4_define([nd_micro_version], [1])
+m4_define([nd_minor_version], [20])
+m4_define([nd_micro_version], [0])
 m4_define([nd_version], [nd_major_version.nd_minor_version.nd_micro_version])
 
 dnl **************************************************************************