[crossfire] Light sources on world map roadways

[Rick Tanner]

This has been posted as a Feature Request on SourceForge as well.

#280 Light sources on world map roadways
https://sourceforge.net/p/crossfire/feature-requests/280/


Some ideas discussed on IRC/Discord was.
* The concept does not take away from the medieval or fantasy aspects of 
the game
* Light sources that are maybe 2 in radius in some spots, otherwise a 
light radius of 1
* Maybe use the idea of glowing bricks to explain the lore of the light 
sources in the roadway instead of a lamp post

Implementing the idea is already possible, but I was hoping to get more 
discussion and feedback in the feature request.