Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index ae8505e..bcdca80 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Net-Groonga-HTTP

 {{$NEXT}}

+0.02 2013-04-25T08:05:35Z
+
+    - Documentation enhancements.
+
 0.01 2013-04-25T07:38:23Z

     - original version