Update read me with links to site + documentation

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1018990 b8457f37-d9ea-0310-8a92-e5e31aec5664
remove extra //

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1018991 b8457f37-d9ea-0310-8a92-e5e31aec5664