v0.7.0

Features

Methods to obtain a mutable access to all rules and models.

Introduced new methods in Battle and in some other components to let the player modify the rules and the models in the context of custom events.

Rounds can now be initiated by multiple actors.

A round can be started by multiple actors with the new function StartRound::trigger_with_actors. All actors can use their abilities, in no particular order.
EndRound automatically ends the round for everyone.