[Suggestion] Spawners or (multiple) items

[mrfloris]

It would be quite cool if we can have special spawners that we can sell to players, for example one spawner that spits out both sheep AND cows, rotating between them.

Additionally, to have the ability to set an item to a spawner, and/or multiple items. This way we can have an admin spawner that we can place for drop party events. That could spit out celebration cake as well as emerald and enchantment books. For example.

I hope this would be possible, without a performance hit.