[gnome-shell] Bump version to 3.13.91

[Florian Müllner <fmuellner src gnome org>]

commit d3418f6381da682f323997e9373feb6f77906172
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Sep 3 14:06:46 2014 +0200

    Bump version to 3.13.91
    
    Update NEWS.

 NEWS         |   21 +++++++++++++++++++++
 configure.ac |    4 ++--
 2 files changed, 23 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 56e77a9..608eace 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,24 @@
+3.13.91
+=======
+* Fix keynav into session menu on login screen [Florian; #735614]
+* Add gesture to summon message tray [Carlos G.; #735625]
+* Accept scrolls/swipes either way on the screen shield [Jasper; #734874]
+* Animate opening the app picker and improve app folder animations
+  [Carlos S.; #734726]
+* Animate app icons on launching a new window [Carlos S., Florian; #734726]
+* Show the on-screen keyboard when touch input is being used [David; #702015]
+* Misc. bug fixes [Bastien, Owen, Florian, Carlos G.; #735190, #735385,
+  #735608, #735681]
+
+Contributors:
+  Carlos Garnacho, David King, Kalev Lember, Florian Müllner, Bastien Nocera,
+  Carlos Soriano, Jasper St. Pierre, Owen W. Taylor
+
+Translations:
+  Fran Diéguez [gl], Sweta Kothari [gu], Manoj Kumar Giri [or],
+  Alain Lojewski [fr], Praveen Illa [te], Arash Mousavi [fa],
+  Andika Triwidada [id]
+
 3.13.90
 =======
 * Make use of GLSL optional [Adel; #733623]
diff --git a/configure.ac b/configure.ac
index 49cafb3..6f30b6c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.63)
-AC_INIT([gnome-shell],[3.13.90],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell],[gnome-shell])
+AC_INIT([gnome-shell],[3.13.91],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell],[gnome-shell])
 
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_SRCDIR([src/shell-global.c])
@@ -76,7 +76,7 @@ AC_MSG_RESULT($enable_systemd)
 CLUTTER_MIN_VERSION=1.15.90
 GOBJECT_INTROSPECTION_MIN_VERSION=0.10.1
 GJS_MIN_VERSION=1.39.0
-MUTTER_MIN_VERSION=3.13.90
+MUTTER_MIN_VERSION=3.13.91
 GTK_MIN_VERSION=3.7.9
 GIO_MIN_VERSION=2.37.0
 LIBECAL_MIN_VERSION=3.5.3