update documents for VPC route table rewriting
Checking in changes prior to tagging of version 0.05.

Changelog diff is:

diff --git a/Changes b/Changes
index 500871e..d8ea173 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension MHA-AWS

 {{$NEXT}}

+0.05 2014-08-16T08:09:50Z
+
+   - update document for VPC route table rewriting.
+
 0.04 2014-05-26T10:18:34Z

     - if timeout reached in stopping the old master instance (still "stopping" state), detected as it be stopped.