Fix AISpawner so it can be modified after a mission starts.

[Hayes.GR]

Right now the AISpawners are quite limited for what you can use them for. A few changes would make them vastly more useful.
The way they work at present is you can place them down and have them attack control zones.
However, you have no way of shutting them off other than deleteVehicle. You can't edit them to switch sides or reduce the values to 0 or anything you simply get an error or it ignores it depending on which variable you change.

The first thing I would suggest about them is add a conditional which needs to be true for them to spawn.
Second fix the sides, faction and all amounts so they can be edited after the mission.

This would allow for things like creating a dynamic map where in you could have areas of control and in them only alies spawn I mean it makes no sense to take over an area and an enemy spawns in it because there is no way to shut off the nearby AISpawner.

By having that ability you could build perpetual warzone maps with battle lines. That way you areas that are taken over could spawn alies for that side.