unit-spawner
    animations
    max_count_of_owned_units
    max_friends_around_to_spawn
    spawning_cooldown
    spawning_radius
    spawning_spacing
    max_richness_for_spawn_shift
    max_spawn_shift
    pollution_cooldown
    result_units = table of UnitSpawnDefinition
    
UnitSpawnDefinition =   {
                            id = unit name
                            weight = double
                        }
