add option to pre register to events

db/migrate/20130711043459_create_events_registrations_table.rb

@@ -0,0 +1,11 @@
+class CreateEventsRegistrationsTable < ActiveRecord::Migration
+  def up
+    create_table :events_registrations, :id => false do |t|
+      t.references :registration, :event
+    end
+  end
+
+  def down
+    drop_table :events_registrations
+  end
+end

db/migrate/20130711044247_add_require_registration_to_events.rb

@@ -0,0 +1,5 @@
+class AddRequireRegistrationToEvents < ActiveRecord::Migration
+  def change
+    add_column :events, :require_registration, :boolean
+  end
+end