* tweaked some hospital sizes and backgrounds
* map [+transport] updated multiplayer support
* map [city_train] removed multiplayer support, the map is just too small
* there are only 7 alien spawnpoints in city_train map
* map [corrupter_crash] updated multiplayer support
* map [dam] updated multiplayer support
* map [england] updated multiplayer support
* adjusted the maxaliens parameter for estate map
* map [estate] removed the multiplayer support - the map is just too small
* map [ferry] updated multiplayer support
* map [fighter_crash] updated multiplayer support
* map [mine] updated multiplayer support
* map [mine] adjusted maxaliens parameter
* map [mine] added alternative entrance
* map [mine] cleanup