Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index 1c28028..b6cf229 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension Plack-Middleware-JSONParser

 {{$NEXT}}

+0.02 2014-04-03T12:49:02Z
+    - Add undef check
+
 0.01 2014-04-03T11:44:28Z

     - original version