Checking in changes prior to tagging of version 0.20.

Changelog diff is:

diff --git a/Changes b/Changes
index a9ff9bc..f580e1a 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension WWW-Form-UrlEncoded-XS

 {{$NEXT}}

+0.20 2014-11-18T08:22:47Z
+
+   - add 0 terminate
+
 0.19 2014-04-30T03:05:15Z

    - add test about \xE5. it must becom %E5 with build_urlencoded