update to version 1.3

git-svn-id: https://plugins.svn.wordpress.org/mystickymenu/trunk@880730 b8457f37-d9ea-0310-8a92-e5e31aec5664
update version 1.3 readme

git-svn-id: https://plugins.svn.wordpress.org/mystickymenu/trunk@880731 b8457f37-d9ea-0310-8a92-e5e31aec5664