* map [+tropic] replaced Corrupter UFO by actual prefab
* added spawnpoints for mp in prefab of crashed Bomber UFO
* added spawnpoints for mp in prefab of crashed Corrupter UFO
* added spawnpoints for mp in prefab of crashed Gunboat UFO
* added spawnpoints for mp in prefab of Bomber UFO
* added spawnpoints for mp in prefab of Corrupter UFO
* added spawnpoints for mp in prefab of Fighter UFO
* added spawnpoints for mp in prefab of Gunboat UFO
* added spawnpoints for mp in prefab of Harvester UFO
* added spawnpoints for mp in prefab of Scout UFO
* added spawnpoints for mp in prefab of Supply UFO