added quest class
added levels and tasks
added completed object to quests
added more delete security and completed object to both level and task
client side Facebook login with popup
little css to center the FB login button
added automatic creation deletion of xmpp users
small fix
small fix
moved port to config
added lock on quests and levels
added daily and weekly checklist items
added ids to unlock
lots of variable renaming + unit testing student, group and classroom
updated lock and unlocking for levels
added simple group assignment authoring page
updating data model when changing tab
optimised classroom restrieval
bug fixes when no classrooms are found
html responsive design