Add email notifications for events registrations, add switch-checkboxes, create EventsRegistrations controller, separate page for events that require registration

app/views/conference_registrations/_registration_info.html.haml

@@ -1,20 +1,5 @@
 - if @conference.questions.any?
   = render partial: 'conference_registrations/questions', locals: { f: f }
-- if @conference.program.events.with_registration_open.any? || @registration.events.any?
-  = f.inputs 'Pre-registration required for the following:' do
-
-    - @registration.events_ordered.each do |event|
-      %label
-        = hidden_field_tag "registration[event_ids][]", nil
-        = check_box_tag "registration[event_ids][]", event.id, event.registrations.include?(@registration)
-        = event.title
-        .text-muted
-          = registered_text(event)
-          - if event.scheduled?
-            (Scheduled on: #{event.start_time.to_date})
-      %br
-
-
 
 = f.inputs 'Your Travel Info' do
   = f.input :arrival, as: :string, label: 'Your arrival time', input_html: { value: (f.object.arrival.to_formatted_s(:db_without_seconds) unless f.object.arrival.nil?), id: 'registration-arrival-datepicker',start_date: @conference.start_date,end_date: @conference.end_date,readonly: 'readonly'  }