Color: Moved SColor* structs into SColor.h, so they can be used without
indirectly including CVector[34]D.
Terrain: Added 'base colour', for the Actor Viewer to be able to
modulate the colour of normally-white terrain.
Removed some "using namespace std" (because it doesn't make the code
easier to read, and it defeats the point of namespaces, and the rest of
the code doesn't do it).
This was SVN commit r4392.
- explicitly split ambient and diffuse
- add renderer.shadowZBias to bias depths in the depth texture
and avoid flickering artifacts caused by Z fighting
- cantabrian_generated uses new light values so that shadows aren't
pitch
black
This was SVN commit r3508.
