on_command interface
Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
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+++ b/Changes
@@ -1,6 +1,8 @@
 Revision history for Perl extension UnazuSan

 {{$NEXT}}
+
+0.02 2013-09-04T16:48:56Z
     - add `on_command` interface

 0.01 2013-09-04T14:20:14Z