Add missing guard, per CR-ClassRequestTool-4
Fixed "double error" problems in course for controllers doing renders
Reduced multiple checkboxes to single checkbox on close form.  Added btn-default to styles for buttons.
First pass at saner update method.
Pre_class appt, future classes, and misc JS cleanup.
Work toward JS interface working.
Changes per review by Bobbi
Base whether you can delete or not on number of undeleted sessions/sections, not position.
Fix bug from demo
LTSCLASREQ-96 - No more "Schedule future class" checkbox, prompts user if past classes and future classes both exist.
Whitespace cleanup
LTSCLASREQ-97 Fix for bug in handling of session_attributes in adjust_status
Fix for bug caused by misunderstanding formtastic :checkboxes field.
Removed meaningless .blank? check.
Patch: Makes empty sessions_attributes apply cleanly.  Not sure if this is the right thing to do, but need to talk it over, so this works in the meantime.
Duplicate IDs for dash_* switched to classes.
LTSCLASREQ-91 - First pass at cleaning up dashboard.
LTSCLASREQ-98 - Set up cronjob on deploy.
Changes per Emilie
Change to quality env to allow mailing. (Note - should be exemplars?)