摘要:Facebook FQL 取得所有好友的好友列表
SELECT uid, name, work_history FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 IN (SELECT uid FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me()) and is_app_user=1))
雖然還沒用到也沒實際檢查抓到的是否正確，不過看起來應該沒錯，先記錄一下
