[tomboy] Update NEWS for 1.15.4

[Aaron Borden <adborden src gnome org>]

commit 5353bfb4fc1d4d3063b0090c4e3d999c9db38647
Author: Aaron Borden <adborden live com>
Date:   Tue Jan 14 22:57:59 2014 -0800

    Update NEWS for 1.15.4

 NEWS |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index b67e558..23730de 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,9 @@ Please send questions and suggestions to
 Please report bugs using http://bugzilla.gnome.org/
 (http://bugzilla.gnome.org/enter_bug.cgi?product=Tomboy).
 
+Version 1.15.4
+* Translation updates: de, po, sl
+
 Version 1.15.3
 * Fix zombie processes when reading proxy settings
 * Better error reporting during note parse (Guido Günther)