fix queuing way
Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index bb17c96..909a445 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension APNS-Agent

 {{$NEXT}}

+0.04 2014-03-01T13:08:19Z
+    - refactor message queuing way
+
 0.03 2014-03-01T12:47:11Z
     - add `send_interval` option