Renamed Node struct to Entry.
Updated Deque to use Entry struct.
Updated Hash to use Entry struct.
Created FlightFacade to handle Flight operations like create and show.
Refactored FlightDequeManager to use FlightFacade and Entry.
Updated FlightDeque to use FlightFacade.
Updated FlightHashManager to use FlightFacade and Entry.
Updated FlightHash to use FlightFacade.
Created Node struct to be used on binary tree.
Created first version of binary tree called Tree. Some methods not implemented yet.
Created first version of FlightTreeManager.
Created first version of FlightTree.
Added FlightTree to main app.
Added zip files to be ignored.