Checking in changes prior to tagging of version 0.39.

Changelog diff is:

diff --git a/Changes b/Changes
index 4cc9a33..5ea6382 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,14 @@ Revision history for Perl extension Kossy

 {{$NEXT}}

+0.39 2014-10-20T05:46:07Z
+
+        - fix some document bug (Thanks hisaichi5518, avvmoto, niku4i)
+        - improve perfomance
+          cache router result
+          add Kossy::Header
+          render json
+
 0.38 2014-05-29T06:35:40Z

         - re-packaging with Minilla