[gnome-backgrounds] Update version number and NEWS for 3.15.91

[Thomas Wood <thos src gnome org>]

commit 06bb03deda65d9cb2782ae8e78d4467c13ade041
Author: Thomas Wood <thos gnome org>
Date:   Mon Mar 2 17:11:14 2015 +0000

    Update version number and NEWS for 3.15.91

 NEWS         |   11 +++++++++++
 configure.ac |    2 +-
 2 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index fe60933..05409e4 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,15 @@
 ===============
+Version 3.15.91
+===============
+
+* Release for GNOME 3.15.91
+
+Updated translations:
+
+  Daniel Korostil (uk)
+
+
+===============
 Version 3.15.90
 ===============
 
diff --git a/configure.ac b/configure.ac
index 008766e..d2db27b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([gnome-backgrounds],
-        [3.15.90],
+        [3.15.91],
         [http://bugzilla.gnome.org/browse.cgi?product=gnome-backgrounds],
         [gnome-backgrounds])