Changes

Mover model group is a new mover definition unit. Idea The idea of this new unit is to have a system which can easily combine compabible compatible models and animations. The main use is for characters to remove the need of definition for every combination of models and animations. Moreover these mover groups can use props in separate models and you can easily "skin" them to specific bones.

Unit <code>mover_desc</code> represents model and it's its data. It is located in <code>/base/def/world/mover_desc.sii</code>.