Delete readme

git-svn-id: https://plugins.svn.wordpress.org/super-rss-reader/trunk@845048 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update readme

git-svn-id: https://plugins.svn.wordpress.org/super-rss-reader/trunk@845049 b8457f37-d9ea-0310-8a92-e5e31aec5664