Implement weather effects (rain)

[Try]

Currently game missing rain, wind, sun texture, moon texture.

Textures to look at:

SKYRAIN-C.TEX
SKYRAINCLOUDS-C.TEX
SKYRAINDROP-C.TEX
SKYRAINSPLASH-C.TEX

Api entry:

Wld_IsRaining

*.ini file:

GAME        skyEffects
SKY_OUTDOOR zRainWindScale
SKY_OUTDOOR zSunName
SKY_OUTDOOR zSunSize
SKY_OUTDOOR zSunAlpha
SKY_OUTDOOR zMoonName
SKY_OUTDOOR zMoonSize
SKY_OUTDOOR zMoonAlpha

Sky extra

INSTANCE ZSKYNIGHT1

Wind

zCVob::visualAniMode = {NONE, WIND, WIND2}
zCVob::visualAniModeStrength

[czarnyafgan]

I'd love to see that so much!