Oops /student page wasn't working for DS because I'm an admin.
task_id is string not numeric so we can lock the completion if the type is not U.
Make links black.
Show pre-provided code under the demonstrations in the outline.
Oops missed the locked icon.
Script for rollback of migrations.
Allow admin to override locked status to set attempt to complete.
Don't add left padding to <pre> if all the checkboxes are in the left margin.
Fixed bug with description YAML.
Handle pages when attempts_json is not defined
Don't lock Demonstration tasks.
Add /mark_task_complete handler.  Also /cometio/io shouldn't require authentication.