Add tickets to registration segment

db/migrate/20140529133052_add_ticket_description_to_conference.rb

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+class AddTicketDescriptionToConference < ActiveRecord::Migration
+  def change
+    add_column :conferences, :ticket_description, :text
+  end
+end

db/migrate/20140529133228_add_description_to_supporter_level.rb

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+class AddDescriptionToSupporterLevel < ActiveRecord::Migration
+  def change
+    add_column :supporter_levels, :description, :text
+  end
+end

db/migrate/20140529133339_add_ticket_price_to_supporter_level.rb

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+class AddTicketPriceToSupporterLevel < ActiveRecord::Migration
+  def change
+    add_column :supporter_levels, :ticket_price, :string
+  end
+end