Spawn animation

[da-rulez]

Is your feature request related to a problem? Please describe.
NPC's appear out of thin air

Describe the solution you'd like
I would like it, if it was possible to set an animation for spawning an NPC. This animation could be set in the spawn NPC attribute.
I'm suggesting to set it on the spawn attribute so you can make spawn animations that fit the NPC, and that fit the maps they spawn in.