Exam output fixes

Fixed bug where comments weren't stripped of linebreaks.
Added list of students who never started the exam at the end.
Bug fixes

Fixed bug where grades that werent' actually finished were factored
into the shown average.
Fixed bug with exam output for students who didn't finish their test
being in wrong columns and order.
TinyMCE fix
Score finding fix
Trip Fixes
No JS support

Practice exam can be finished without any javascript.
All exam related js also handle errors by reverting to js-less behavior.
Better messages.
Added wiggle room

Added an extra minute to submit answers and grades.
Made timer pulse when time is up.
Fixed bug where pending test would show up as 0 points if you weren't
completely finished.
Fixed bugs with finding/displaing past exams
Bug fixes

Fixed bug where reviewAction didn't work
Fixed bug where students could start a test if they pressed start a day
before.
Fixed graphical bug with the dropdown menu.
Persistent Grades

Made grades persist even if the grader drops.
Changed the exam system so it doesn't show you your total score.
Added a hint for people with broken web browsers
Fixed exam download bug

The list of students who didn't take the exam was incredibly wrong.
Added middle name support
IE exam support

Stopped using classList
Better use of XMLHttpRequest
IE sucks
More IE support and bug fixes

Fixed two bugs that only happen when grading starts after the test ends
        'Grading starts at '… date and time where wrong
        It was actually possible to start grading early.

Added IE support by making the start button on the wait page be the
type 'submit'
Merge branch 'master' into ajax

Conflicts:
	src/Bio/ExamBundle/Entity/Grade.php
	src/Bio/PublicBundle/Resources/public/css/page.css