[REL] New buoys

Originally Posted by MLF

What bugs do you see?

- halo and light effects are no more syncronised after TC

- there is a global light bug (with lights of all kinds : yellow, rose, red, green ...) on all the environment (trees and ships, everywhere, as if there was thunder) if there are too many buoys with a light node (when I saw this, there were 10 buoys of that kind), that's why I've added the light effect as optional ...

Now, I have reworked the halo effect a bit for the danger buoys (less brief flashes). Also added a bigger halo for the flashing green and red buoys. Will probably post the link for version 2 soon.