These new lights replace the lone taxi light cone and actually light
up the runway even without Rembrandt. They are disabled when
Rembrandt is enabled.
* Models/mesh_lights.ac (Cone-texture),
Models/light-cone.eff,
Models/Lockheed1049h_Lights.xml (Cone-texture): delete.
* Dialogs/Lockheed1049h-menu.xml ("hide light cones"),
Nasal/Lockheed1049h.nas (hide-light-cones): delete.
Lockheed1049h-common.xml (hide-light-cones): delete.
* Models/Lockheed1049h_Lights.xml
({Taxi,Left Landing,Right Landing} Light Spot): new.
* Models/light_[clr].ac,
Models/light_spot.png: new; thanks to John Williams for providing them
from his 757-200 model.
