Lighting Rendering Efficiencies

TODO: Debug function that lays a mine.
SO you can make sure glow around set mines is 
NOT being re-setup when destroying a light with your head.


Right now I am checking my lighting map for inefficiencies.
Everything looks correct, but I am suspicious that the lighting 
code may be re-rendering everything when one light breaks,
rather than only re-rendering the area affected by the broken light.