readme file update

git-svn-id: https://plugins.svn.wordpress.org/https-redirection/trunk@957998 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme formatting update

git-svn-id: https://plugins.svn.wordpress.org/https-redirection/trunk@958000 b8457f37-d9ea-0310-8a92-e5e31aec5664