Comment in instructor dash in response to PR feedback

Inserted by @jrbl and @caesar2164 on behalf of @dcadams.
Adding a YAML file to demonstrate how to include anonymized user IDs in Studio elements.
Revert "experiment for unauthenticated access"

This reverts commit e987b11df8b9c3409b403573200bcab7f887c173.
Patch register.html to make all themes use tos#honor.
dump_course_structure cmd: "flat" structure, csv
Port of invitation/enroll/unenroll email functionality
into beta dashboard.

Also includes new functionality, in both legacy and beta
dashboard, to include appropriate email text for a
Shibboleth course.

Conflicts:
	lms/djangoapps/instructor/tests/test_api.py