Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index 4848eff..bb45970 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension WWW::Google::Cloud::Messaging

 {{$NEXT}}

+0.04 2014-02-05T13:27:53Z
+    - fixed pod
+    - added some constants
+
 0.03  Thu Jan  3 13:40:04 2013
     - wrote docs (gfx++)
     - add LWP::Protocol::https to the dependencies (gfx++)