initial password when adding a student is 'password'. GradeBook will not display when user is not logged in

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@871680 b8457f37-d9ea-0310-8a92-e5e31aec5664
stagging v2.0.3

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@871681 b8457f37-d9ea-0310-8a92-e5e31aec5664