flight departure logic

[Tobias Bocanegra]

every dispatched cart is moved to the flights node
if all luggage of a flight is dispatched, a cut scene is shown where the carts (maybe 50% zoom) move to a shuttle and the shuttle will eventually lift off
the screen also shows the stats and points earned eg:

• number of processed items: 28 * 10 = 280
• number of carts used: 4/3 = -50
• number of returned carts: 0 = 0
• time bonus (malus): 0:30 = 30
• total: 260