[NAG] Lots of change IV

- Try fixing env_projectedshadow
- Fix Hud & Flashlight whithout suit
- Delete lot of useless stuff of estranged code
- Add dynamic crosshair size
- Fix gib blood
- Fix combine mine / Enhanced there effectivity
- Add nag ConVar that switch a lot of stuff
- Add Big blood splat on human explode
- Increase weapon spread
- Other little things