Create LootTableBox.sqf

Not Tested, but wanted more eyes on it

you need to add 
```cpp

wai_num_of_crates = 1;
wai_loot_tables = ["Military", "MilitaryIndustrial", "MilitarySpecial", "HeliCrash_No50s", "SupplyDrop", "HeliCrash", "MassGrave"];
```
to mission_cfg.sqf

and 

```cpp
//  Spawn Supplies -- Crates
			for "_i" from 1 to wai_num_of_crates do
			{
				waitUntil{!isNil "BIS_fnc_selectRandom"};
				_crate_position = [_position,0,30,3,0,2000,0] call BIS_fnc_findSafePos;
				if ((count _crate_position) == 2) then {
					waitUntil{!isNil "BIS_fnc_selectRandom"};
					_type = wai_crates call BIS_fnc_selectRandom;
					diag_log format["WAI: Creating box at %1",_position];
					_crates = _crates + [[_crate_position,_type,"Random"] call wai_spawn_crates];
				};
			};
```

to the mission you want the loottable box.