Checking in changes prior to tagging of version 0.12.

Changelog diff is:

diff --git a/Changes b/Changes
index e9977ca..f875b43 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension WWW-Form-UrlEncoded-XS

 {{$NEXT}}

+0.12 2014-02-18T03:11:35Z
+
+    - build_urlencoded supports hashref and arrayref arguments
+
 0.10 2014-02-17T06:13:10Z

     -