Add requirements.
Improve warning message.
Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index 08d71a6..74e2fb1 100644
--- a/Changes
+++ b/Changes
@@ -2,7 +2,7 @@ Revision history for Perl extension Test-JsonAPI-Autodoc

 {{$NEXT}}

-0.03 2013-11-02T14:43:51Z
+0.04 2013-11-02T15:15:26Z

     - Add documents.
     - Fix some bugs.