readme and assets update

git-svn-id: https://plugins.svn.wordpress.org/wpsso-plm/trunk@1023057 b8457f37-d9ea-0310-8a92-e5e31aec5664
v1.1

git-svn-id: https://plugins.svn.wordpress.org/wpsso-plm/trunk@1023061 b8457f37-d9ea-0310-8a92-e5e31aec5664