Title gets game name from Main
Rewrite some documentation for #18
Redo change made in 720ebaf, rename variables for #18
Fixed bug where planes would not be deleted from the airspace when the
user quit the game.
Fixed gameplay issue where user could assign the aircrafts exit point as
next waypoint bypassing the flight plan of the plane
Merging
Merge remote-tracking branch 'origin/master' into Aircraft_take_off