add students on hold with billing to restart to a locations total active student count.
remove registerable from user model, remove white space from collapse div in parent_student
update parent student collapse
"update"

Merge remote-tracking branch 'upstream/master'
add CSV export to student and users
adjust logic in view so parents can only view certain information, added new student button that passes parents user_id via params
adjusted logic to limit user show content to teachers and assistants