ver 1.4.0

git-svn-id: https://plugins.svn.wordpress.org/simple-map/trunk@866279 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/simple-map/trunk@867383 b8457f37-d9ea-0310-8a92-e5e31aec5664