Soon : adding shellshock

Last update will probably be replacing the rangefinder with a true model, not keeping the camera :)

Planned content for 2.2 Update :

- Options for activating or not sfi-fi overlay
- Less annoying sounds for the zooming sound
- Fine-tuning of the distance where distants sounds should be played
- Maybe one or two new type of shells (White Phosphorus or something like that)
- Changing close Smoke sfx
- Maybe make shells spawnable so that admins can make realistic mortar strikes without acually firing it.

Goy any idea / experiencing any bugs ? Please tell me here.