Add the miratons from the conf.o.o live instance

db/migrate/20130515131210_drop_additional_speakers.rb

@@ -0,0 +1,9 @@
+class DropAdditionalSpeakers < ActiveRecord::Migration
+  def up
+    remove_column :registrations, :additional_speakers
+  end
+
+  def down
+    add_column :registrations, :additional_speakers
+  end
+end