Changes

Because engine ensures that only valid model-anim combinations will be created, it may seem that animation tags should contain only tags describing the activity. But the model-anim combinations are choosen in the moment of mover generation, we want to limit the combination pool as much as possible. Because of that mover anim tags should contain (apart from the activity itself) tags describing compatible mover desc. In <code>mover_anim</code> the example above these tags are <code>human</code> and <code>man</code>. And in the related mover group use these tags in <code>anim_tags</code>. In the example it is the tag <code>man</code>.