Checking in changes prior to tagging of version 0.13.

Changelog diff is:

diff --git a/Changes b/Changes
index de92c98..677404b 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,9 @@
 Revision history for Perl extension WWW::GoKGS.

+0.13 Jun 24th, 2014
+
   - WWW::GoKGS#user_agent, #from, #date_filter and #html_filter
-    become 'rw'.
+    become 'rw'
   - Add WWW::GoKGS#agent

 0.12 Jun 23rd, 2014