Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index 30a8c89..8414045 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,12 @@ Revision history for Perl extension B-Tap

 {{$NEXT}}

+0.02 2013-09-14T06:59:09Z
+
+    - Oops. I forgot to restore MARK.
+      It fixed segmentation fault on 32bit machines.
+      (Reported by syohex++)
+
 0.01 2013-09-14T03:37:15Z

     - original version