Goofed around with log-file writing. Lots of it in getOutput.exp and startExercise.exp. Moved some stuff around in getOutput.exp. Changed front page to be more vertical, abandoning the old leftbox/rightbox look. Changed changeLanguage.php to be button-based, instead of radio-button based. Modified the control panel to also show seed values
Hecka functionality. Modified exercises.php to have a create test row, added getManyQuestions.php, createTest.php, and performTest.php. Some extra case-work in getOutput.exp for set questions. Seed saving in createTest.php to temporary files. Database access for different classes, and student class enrolment slots in performTest.php. Added several constants to commondefs.php, updated several places where there should've been constants but were hard-coded values.