Checking in changes prior to tagging of version 0.20.

Changelog diff is:

diff --git a/Changes b/Changes
index 2c1f8e6..62eb372 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for WebService-Simple

+0.20  2013/08/20
+       - Support Perl 5.18.*
+       - Fixed for Hash randomization.
 0.19  2013/08/20
        - Testing POD as author tests.
        - Move repository.