Checking in changes prior to tagging of version 1.13.

Changelog diff is:

diff --git a/Changes b/Changes
index 24521d3..2c89d38 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl module SQL::Maker

 {{$NEXT}}

+1.13 2014-02-10T04:29:18Z
+
+    - Documentation update(Gelu Lupas)
+
 1.12 2013-06-25T04:25:24Z

     - column alias can be specified by ArrayRef in SQL::Maker#select