update new wsl doc url

git-svn-id: http://plugins.svn.wordpress.org/wordpress-social-login@654414 b8457f37-d9ea-0310-8a92-e5e31aec5664
improve steam

git-svn-id: http://plugins.svn.wordpress.org/wordpress-social-login@654486 b8457f37-d9ea-0310-8a92-e5e31aec5664