Checking in changes prior to tagging of version 0.20.

Changelog diff is:

diff --git a/Changes b/Changes
index 73f06cc..c1f3e7a 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension Nephia

 {{$NEXT}}

+0.20 2013-06-27T13:06:30Z
+        - bug fix : sort flavor order by "view or not" rule
+
 0.19 2013-06-27T07:13:20Z
         - feature : allow to use multiple flavor in nephia-setup