Checking in changes prior to tagging of version 0.23.

Changelog diff is:

diff --git a/Changes b/Changes
index 6d169ed..1ec249e 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for Perl extension Test::Pretty

+0.23 2013-02-15T19:52:51
+
+    - Do not pass when unexpected exit
+
 0.22

     - do not fail with no_plan(gunyarakun++)