one more step towards finishing up the new lighting/

..glossyPower is now between 0..1
..adapted all defaults to saner values
..changed default table (still coder art, but at least a bit better)
..introduce new reflection/specular component handling for envmap, wired to tex input 3, currently unused (misses environment map selection in UI,etc)
..have (un)gamma of textures/screen and tonemapping (whacky like this (alpha blends are weird then), later-on (float3-framebuffer) use separate postprocess)
..tweak attenuation, although in the end might just use standard/physical falloff with no range