improved docs
improved docs

henrylee2cn/xorm,zileyuan/xorm,lunny/xorm,Michael2008S/xorm,go-xorm/xorm,zj8487/xorm,aviau/xorm,vCaesar/xorm,tempbottle/xorm,evalphobia/xorm,tempbottle/xorm,toophy/xorm,henrylee2cn/xorm,lunny/xorm,ymhhh/xorm,vCaesar/xorm,zj8487/xorm,go-xorm/xorm,zileyuan/xorm,toophy/xorm,Michael2008S/xorm,aviau/xorm,ymhhh/xorm,evalphobia/xorm