EasyUncle（账本叔叔）是一个基于easytrader(https://github.com/shidenggui/easytrader)封装的适用于多账户，多策略，有高可用性的下单/持仓管理模块
{
"type" : "mongodb",
"port" : 27017,
"username" : "username",
"pwd" : "password"
"db_name" : "easyuncle",
}
accounts.json范例, 其中key是用于给自己识别的自定义的名字，建议用英文, 每个账户中用"brokerage"来标识券商，这里"yh"代表是银河，之后会调用easytrader.use("yh")
{
"account_1" : { "username": "username", "pwd" : "password", "brokerage": "yh" },
"account_2" : { "username": "username", "pwd" : "password", "brokerage": "yh" },
}