add labster_demo flag in course
invite students button and modal
ajax post to invite students
Merge branch 'labster/master' into labster/feature/invite-students
add rest_framework to installed apps
Merge branch 'labster/master' into labster/feature/invite-students
add widget_tweaks app
add cors to cms
add token_key property for easy access from template
duplicate course on submit, with progress view
invite students after the course is duplicated