Version 4.0

git-svn-id: https://plugins.svn.wordpress.org/sharexy/trunk@1040353 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme update

git-svn-id: https://plugins.svn.wordpress.org/sharexy/trunk@1040355 b8457f37-d9ea-0310-8a92-e5e31aec5664