#17.06.13
ALTER TABLE `coursemanager_courses` ADD `completion` DATETIME NOT NULL;
ALTER TABLE `coursemanager_lessons` ADD `completion` DATETIME NOT NULL;
ALTER TABLE `coursemanager_quizes` ADD `completion` DATETIME NOT NULL;
#27.06.13
ALTER TABLE `coursemanager_quizes` MODIFY `description` text NOT NULL;
#02.07.13
ALTER TABLE `coursemanager_quizes` add `keywords` varchar(250) DEFAULT NULL;
