[gnome-calendar] Bump 3.21.91 release

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

commit faf61122fd5c77deb683b7e6e1bc04d0991128c9
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Aug 30 01:14:42 2016 -0300

    Bump 3.21.91 release

 NEWS         |   23 +++++++++++++++++++++++
 configure.ac |    2 +-
 2 files changed, 24 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 910db07..8aee0c1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+Major changes in 3.21.91:
+* Updated translations for:
+    * Brazilian Portuguese (Enrico Nicoletto)
+    * Catalan (Jordi Mas)
+    * Czech (Marek Černocký)
+    * Finnish (Jiri Grönroos)
+    * French (Alexandre Franke)
+    * Friulian (Fabio Tomat)
+    * German (Mario Blättermann)
+    * Hebrew (Yosef Or Boczko)
+    * Hungarian (Balázs Úr)
+    * Indonesian (Andika Triwidada)
+    * Kazakh (Baurzhan Muftakhidinov)
+    * Lithuanian (Aurimas Černius)
+    * Polish (Piotr Drąg)
+    * Portuguese (Tiago Santos)
+    * Serbian (Мирослав Николић)
+    * Slovak (Dušan Kazik)
+    * Spanish (Daniel Mustieles)
+    * Thai (Akom Chotiphantawanon)
+* New date chooser calendar
+* Deprecate GNOME_COMPILE_WARNINGS (Ernestas Kulik)
+
 Major changes in 3.21.4:
 * Updated translations for:
     * Arabic (Safa Alfulaij)
diff --git a/configure.ac b/configure.ac
index 0837316..7bca982 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl -*- mode: m4 -*-
 AC_PREREQ([2.69])
-AC_INIT([gnome-calendar],[3.21.4],[http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-calendar],[gnome-calendar],[https://wiki.gnome.org/Apps/Calendar])
+AC_INIT([gnome-calendar],[3.21.91],[http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-calendar],[gnome-calendar],[https://wiki.gnome.org/Apps/Calendar])
 
 AX_IS_RELEASE([minor-version])