Add ability to only turn off chunk loading when all players are offline.

[ttamttamS]

This is similar to #29 and probably even requires the same code. I imagine it working as a third config option.

[covers1624]

So you would like a config for when the server is empty, to turn off all players chunk loading?

[ttamttamS]

Yeah that about sums it up :)

[Silverseppel]

So you would like a config for when the server is empty, to turn off all players chunk loading?

I think it would be better when a chunk loader turn off wenn the owner of the chunk loader is offline and not when all players are offline

[covers1624]

@Chicken-Bones Thoughts on this one?

[Chicken-Bones]

Great idea!