[sushi] release: prepare for 3.18.0

[Cosimo Cecchi <cosimoc src gnome org>]

commit ae264bb1d8d4346b1af1994d671d5644e24ca75a
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Sep 22 16:05:03 2015 -0700

    release: prepare for 3.18.0

 NEWS         |    5 +++++
 configure.ac |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 55265f9..de7b42b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+3.18.0 - "Symbiosis"
+====================
+
+- Translation updates
+
 3.17.4 - "Dark Wave"
 ====================
 
diff --git a/configure.ac b/configure.ac
index 5694562..3b5ff56 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl -*- mode: m4 -*-
 AC_PREREQ(2.63)
-AC_INIT([sushi],[3.17.4],[],[sushi])
+AC_INIT([sushi],[3.18.0],[],[sushi])
 
 AC_CONFIG_HEADERS([config/config.h])
 AC_CONFIG_SRCDIR([src/main.c])