Login to access student content
AbstractUserStudent
Changed Exam to use secure login
Clicker signin and bug fixes

Made clicker sign in work with the global signin, fixed bug where
redirection didn't work, fixed bug where
BioExamBundle:Public:main.html.twig didn't extend a real file.
Score finding update

Made score finding do global login, updated how scores are displayed.
Field trip update
Switch Sections
Cleanup
Merge branch 'better-login' into exam-improvements