Changes to object classes names
Renamed Order class
Added Order class
Added methods for interacting with orders
Testing
Solved adding dish collision
Added method for deleting order at specified date
Testing now work.
Changed DB structure
Changes to object classes
Added id to Menu constructor
Added order id to Order
Added exec. date and server number to Order
Changed some methods due to recent DB changes
Added DB wrapper with Menu methods
Added getOrdersDates method
Added methods for working with Orders
Added getOrdersNotExecuted method
Added several methods
XML parser new Data structure