修复了突击步枪抛壳贴图BUG

Fixed a little BUG on Assault Rifle

重做了机甲重剑，现在它变得更实用了（但是伤害被削了）

Remaked Giant Sword, it's now getting better (but damage be weaked)

新增了简易爆炸物：点燃引线10秒后引爆，可引爆爆炸物。

Addition I.E.D: Explosion on 10second after lite the fuse, you know how to use.

进行了一些调整

Changed some thing, not matter.

覆写了原版的榴弹发射器，将其修改为了轻型武器(可纳入物品栏)，并增加了弹容量（从1发增加到3发），因为甲鱼(制作组外号)此前为步枪添加了榴弹发射槽，让榴弹发射器在原版游戏中的定位变得非常尴尬。

Override the Grenade Launcher of Vanilla game, make it can accept to normal inventory; and i Increase the capacity of ammunition (from 1 to 3), because the rifle have ability to launched grenade —— that make the grenade launcher very awkward.