Minor adjustments

db/migrate/20140713213158_add_is_confirmed_to_conference_registraions.rb

@@ -0,0 +1,5 @@
+class AddIsConfirmedToConferenceRegistraions < ActiveRecord::Migration
+  def change
+    add_column :conference_registrations, :is_confirmed, :boolean
+  end
+end

db/migrate/20140713213502_add_is_participant_to_conference_registraions.rb

@@ -0,0 +1,5 @@
+class AddIsParticipantToConferenceRegistraions < ActiveRecord::Migration
+  def change
+    add_column :conference_registrations, :is_participant, :boolean
+  end
+end

db/migrate/20140713213534_add_is_volunteer_to_conference_registraions.rb

@@ -0,0 +1,5 @@
+class AddIsVolunteerToConferenceRegistraions < ActiveRecord::Migration
+  def change
+    add_column :conference_registrations, :is_volunteer, :boolean
+  end
+end