[Fix] wp-login.php was not loading properly. The is_admin() was not working for wp-login.php and it was sending early output (css). Changed to check also for the URI /wp-login.php

git-svn-id: https://plugins.svn.wordpress.org/wpmobile-apps/trunk@969081 b8457f37-d9ea-0310-8a92-e5e31aec5664
stable tag updated in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wpmobile-apps/trunk@969084 b8457f37-d9ea-0310-8a92-e5e31aec5664