Dropped orders database to fix error

Had to drop the orders database because empty rows were sending back nil for certain parties
Subtotal, total and gratuity calculations work for all food, need to fix

Need to make sure only specific order's food gets calculated
Added functioning receipt subtotals and totals

Added methods to the party class instead of the order class so I could call on @parties
Added Paid or Unpaid functionality

When a user clicks on paid or unpaid for a party, it changes the value to true or false