[Request] decalManagerAddDecal to allow more flags

Currently the exposed console function decalManagerAddDecal, allows for setting only the 'inmortal' flag from script.

More cretive uses for the decals however, turn this limtation a bit awkward.

Function Reference:

Quote:function decalManagerAddDecal( %position, %normal, %rotation, %scale, %decalData, [%immortal] )
- Place a Decal. Immortal decals don't age and must be removed explicitly. Returns Decal ID