[gnome-shell] Bump version to 3.17.91

[Florian Müllner <fmuellner src gnome org>]

commit 0fb13608c5d8225ac06782a2aeddc160d777f8db
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Sep 3 15:28:11 2015 +0200

    Bump version to 3.17.91
    
    Update NEWS.

 NEWS         |   16 ++++++++++++++++
 configure.ac |    4 ++--
 2 files changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index c1b2742..b55c4f0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,19 @@
+3.17.91
+=======
+* Fix login screen spinner causing wakeups while VT-switched away
+  [Ray, Rui; #753891]
+* Fix scrolling of user list on login screen [Florian; #754525]
+
+Contributors:
+  Piotr Drąg, Rui Matos, Florian Müllner, Ray Strode
+
+Translations:
+  Dušan Kazik [sk], Jordi Mas [ca], Aurimas Černius [lt], Stas Solovey [ru],
+  Piotr Drąg [pl], Pedro Albuquerque [pt], Daniel Mustieles [es],
+  Chao-Hsiung Liao [zh_TW], Muhammet Kara [tr], Fran Dieguez [gl],
+  Hannie Dumoleyn [nl], Yosef Or Boczko [he], Tom Tryfonidis [el],
+  A S Alam [pa], Balázs Úr [hu], Alexandre Franke [fr], Frédéric Péters [fr]
+
 3.17.90
 =======
 * Avoid caret/focus viewport changes during pointer movement [Rui; #752138]
diff --git a/configure.ac b/configure.ac
index 3e265be..7a354e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.63)
-AC_INIT([gnome-shell],[3.17.90],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell],[gnome-shell])
+AC_INIT([gnome-shell],[3.17.91],[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=1.21.5
 GOBJECT_INTROSPECTION_MIN_VERSION=0.10.1
 GJS_MIN_VERSION=1.39.0
-MUTTER_MIN_VERSION=3.17.90
+MUTTER_MIN_VERSION=3.17.91
 GTK_MIN_VERSION=3.15.0
 GIO_MIN_VERSION=2.45.3
 LIBECAL_MIN_VERSION=3.5.3