fix typo
Checking in changes prior to tagging of version 0.0.0_02.

Changelog diff is:

diff --git a/Changes b/Changes
index 620be26..1a7dcb6 100644
--- a/Changes
+++ b/Changes
@@ -2,10 +2,12 @@ Revision history for Perl extension Jubatus

 {{$NEXT}}

-0.0.0_02 2013-08-08T21:40:18Z
+0.0.0_02 2013-08-08T12:50:49Z

     - Add Jubatus::Common::Datum

 0.0.0_01 2013-08-02T05:24:24Z

     - original version
+
+