Checking in changes prior to tagging of version v2.1.3.

Changelog diff is:

diff --git a/Changes b/Changes
index 89485e6..07161a8 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,14 @@ Revision history for Perl extension Ukigumo-Server

 {{$NEXT}}

+v2.1.3 2014-04-30T06:45:34Z
+
+    [Feature]
+    - Support duration graph view
+
+    [Bug Fix]
+    - Fix to show 404 on not found
+
 v2.1.2 2014-04-08T07:07:29Z

     - Show build ID column in tables