updated readme / screenshots

git-svn-id: https://plugins.svn.wordpress.org/post-status-notifier-lite/trunk@858390 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme / screenshots

git-svn-id: https://plugins.svn.wordpress.org/post-status-notifier-lite/trunk@858410 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme / screenshots

git-svn-id: https://plugins.svn.wordpress.org/post-status-notifier-lite/trunk@858421 b8457f37-d9ea-0310-8a92-e5e31aec5664