Checking in changes prior to tagging of version 0.24.

Changelog diff is:

diff --git a/Changes b/Changes
index c7f9d06..2581d06 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,8 @@ Revision history for Perl extension Teng

 {{$NEXT}}

+0.24 2014-07-02T09:37:57Z
+
         - ADD: Teng#new takes `sql_builder_class` and `sql_builder_args`

 0.23 2014-06-17T06:06:16Z