Checking in changes prior to tagging of version 0.39.

Changelog diff is:

diff --git Changes Changes
index d218c79..0f264a7 100644
--- Changes
+++ Changes
@@ -2,6 +2,11 @@ Revision history for Perl extension Test-Kantan

 {{$NEXT}}

+0.39 2014-09-19T11:15:40Z
+
+    - Add to_be_a_bag family
+      (Kuniwak)
+
 0.38 2014-09-15T02:04:19Z

     - Added documentation(moznion)