add db support for menu options

[grounded042]

an event should have menu options tied to it

• a menu_items table should be created with the columns:
  • menu_item_id
  • fk_event_id - the foreign key of the event the menu belongs to
  • order - the numerical place on the menu in which this item appears
  • name - the name of the item
  • num_choices - the number of choices for this item
• a menu_item_options table should be created with the columns:
  • menu_item_option_id
  • fk_menu_item_id - the foreign key of the menu item to which the option belongs to
  • name - the name of the option
  • description - a short description of the option