很有趣的插件，可以做扭蛋啦，抽奖啦之类的东西....
简单的示范：
a.开始抽奖画面：
b.抽奖中
c.随机得到物品
d.查看收集图鉴
e.图鉴内容
1.gacha
作用：
get the item at random
梗概：
Plugin Command:
Gacha open # Open the Gacha screen
Gacha add item 1 # Add item #1 to the Gacha
Gacha remove item 1 # Remove item #1 from the Gacha
Gacha clear # Clear the Gacha
Item Note:
<gachaImage:image> # Gacha image file name. Please image put in "img/gacha/" folder.
<gachaNumLot:10> # The number of the lottery.
<gachaRank:5> # The rank of the item(1-5).
参数：
2.gachabook
作用：
display detailed statuses of gacha item
梗概：
Plugin Command:
GachaBook open # Open the gacha book screen
GachaBook add weapon 3 # Add weapon #3 to the gacha book
GachaBook add armor 4 # Add armor #4 to the gacha book
GachaBook remove armor 5 # Remove armor #5 from the gacha book
GachaBook remove item 6 # Remove item #6 from the gacha book
GachaBook clear # Clear the item book
参数：
