Added announcement feature

Change-Id: Iea35a96e67f31d5cf71ad4437172907ae5e32928
diff --git a/Changes b/Changes
index b2a32c3..ce0e989 100755
--- a/Changes
+++ b/Changes
@@ -1,6 +1,7 @@
-0.23 2017-06-29
+0.23 2017-09-20
         - Added query creator tool.
         - Fix visualization of empty contexts in KWIC.
+        - Added announcement template.
 
 0.22 2017-06-26
         - Added user authentification using Kustvakts LDAP