Minh Vu

Wingspan testbranch

3

I made a more complete conversion to the the wingspan classification system. `AClass` class and type is introduced as well as value `airplaneClass`. Changed min airport size and slot allocation...

Added 747-8I, longer range and better efficiency than 747-400

5

I created 747-8I for to be a more fuel efficient and longer range version of 747-400. I might also consider adding A350-900ULR as there is so far no ULR plane...