Checking in changes prior to tagging of version 0.15.

Changelog diff is:

diff --git a/Changes b/Changes
index 18f9cc7..1514fe9 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension WWW::GoKGS.

+0.15 Jun 29th, 2014
+
   [INCOMPATIBLE CHANGES]

     - Give up implementing incomplete filtering system.