Added airport with drawing, land and liftoff functions.
Merge branch 'master' of github.com:Carolinitzny/BaconGameJam07

Conflicts:
	entity.lua
	main.lua
Aiport triggers landing.
Merge branch 'master' of github.com:Carolinitzny/BaconGameJam07
Merge branch 'master' of github.com:Carolinitzny/BaconGameJam07

Conflicts:
	main.lua