* Code maintenance: Split up GradeBook.php into classes.
* Code maintenance: Removed necessary lines of code such as redundant wp_enqueue_script calls.
* Bug Fix: user_login was incorrectly set to the users second initial of their first name, lastname, and user_id concatenated together, in lowercase.
* Due to the bug fix, we removed the ID column of the gradebook and replaced it with a Login column.  This is the login name the user must use to log in.  The password is still set to password.
* Added a student menu button that handles edit, delete, and statistics views.

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@1041703 b8457f37-d9ea-0310-8a92-e5e31aec5664
typo

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@1041704 b8457f37-d9ea-0310-8a92-e5e31aec5664