Mundo 0.20 Released!

Change-log:

* Refactor player animations.
* Design and implement the death of the player.
* Looting.
* BackPack.
* Use items.
* Removal of unused units keyvaluelists.pas, maps.pas, timers.pas, serverconnections.pas, clientconnections.pas, textureppms.pas, texturetgas.pas.
* Remove unit vectors that is misused in cameras.pas.
* Unify of version constant.
* Create doc units.ods.