[gnome-calendar/gnome-3-22] Bump 3.22.4 release

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 7d0e935b712d1aa67317d9cd4940ce66ec8509ac
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Mar 28 22:26:09 2017 -0300

    Bump 3.22.4 release

 NEWS                                           |    3 +++
 configure.ac                                   |    2 +-
 data/appdata/org.gnome.Calendar.appdata.xml.in |   10 ++++++++++
 3 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 801c6ec..8e490ac 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+Major changes in 3.22.4:
+* Fix outstanding performance issue in Year view
+
 Major changes in 3.22.3:
 * Only decrease search counter when something is removed (Georges Basile Stavracas Neto)
 * Focus entry after calendar selection in quick popover (Mohammed Sadiq)
diff --git a/configure.ac b/configure.ac
index 9741b40..7f304f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl -*- mode: m4 -*-
 AC_PREREQ([2.69])
-AC_INIT([gnome-calendar],[3.22.3],[http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-calendar],[gnome-calendar],[https://wiki.gnome.org/Apps/Calendar])
+AC_INIT([gnome-calendar],[3.22.4],[http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-calendar],[gnome-calendar],[https://wiki.gnome.org/Apps/Calendar])
 
 AX_IS_RELEASE([minor-version])
 
diff --git a/data/appdata/org.gnome.Calendar.appdata.xml.in b/data/appdata/org.gnome.Calendar.appdata.xml.in
index e69de4b..3f9851f 100644
--- a/data/appdata/org.gnome.Calendar.appdata.xml.in
+++ b/data/appdata/org.gnome.Calendar.appdata.xml.in
@@ -42,6 +42,16 @@
   <project_group>GNOME</project_group>
 
   <releases>
+    <release date="2017-03-28" version="3.22.4">
+      <description>
+        <p>
+          This is the fifth stable release for GNOME Calendar 3.22, and fixes
+          an outstanding performance issue in Year view.
+        </p>
+        <p>Thanks to all the contributors that worked on GNOME Calendar!</p>
+      </description>
+    </release>
+
     <release date="2017-02-28" version="3.22.3">
       <description>
         <p>