1.5
reduce drop item aliens been killed.
降低掉物品杀怪数。

1.4
heal gun 254/244 -> 250/240
heal beacon 30/29 -> 25/24
ammo satchel 30 -> 25
reduce drop medkit to kill 120 aliens
reduce drop ammo to kill 100 aliens

reduce medgun ammo for stupid computer

version 1.2
reduce beacon amount
reduce ammo bag amount
add medgun amount
add drop medkit and ammo
del infinite medgun

version 1.1: add 100 heal beacon

2017-5-20: version 1.0