prevent N+1 query
fork
display new course page
add time to stages
integrate forms
remove sort from stages
annotate
integrate front
remove duration from stages
remove useless attribute name and files
update admin page
remove schedules and applies
drop tables
update routes
add datetimepicker
add total_attendees, current_attendees and minimum_atteedees to course,
and display in CHARGAR BAR of course page
update time picker format
remove unused <a> tag
update schame, this schema.rb is regenerate by migration files directly, it should be one and only one correct schema.
fix terrible naming