Make it possible to attack and interact with characters.

This patch makes it possible to attack the deers in the WildAnimals module.
Make the BehavioSystem run on Authority only.

Reasoning: Locations and a few othere data get already transfered
from server to client. Having servers and clients both calculate
unit movement, expecially in a not deterministic way would be a bad idea.
Replicate the currently selected animation to the client.

Reasoning: Only the server runs the behavior trees to determine the unit
behavior. In order for the client to play the correct animation it needs
to be transfered from the server.
Merge PRs #1439 & #1440 by @flo - behavior updates and attackable creatures/players
Add WildAnimals to lineup