Topic: update 0.94.4

- it is not possible to collect ammo from corpses anymore
+ when a solider dies, all his weapons and the remaining ammo are dropped in an "Ammo pack"
+ the picking up of an "Ammo pack" restores at least 20% of ammo of all weapons equipped (excluded the Solar Cannon), plus eventual residual ammo in the pack
* a problem in the AI of creatures in path finding has been fixed
* small textures improvements