author_lesson	author_lesson
bye	bye
info	info
install_course_directory	install_course_directory
install_course_dropbox	install_course_dropbox
install_course_github	install_course_github
install_course_google_drive	install_course_google_drive
install_course_url	install_course_url
install_course_zip	install_course_zip
install_from_swirl	install_from_swirl
nxt	nxt
omnitest	omnitest
play	play
skip	skip
swirl	swirl
uninstall_course	uninstall_course
zip_course	zip_course
