트위터, 페이스북 프로필 이미지 가져오기 facebook profile photo https://graph.facebook.com/사용자닉네임/picturehttps://graph.facebook.com/사용자UID/picture twitter profile photo (bigger/nomal/mini)http://a0.twimg.com/profile_images/사용자UID/aaa_normal.pnghttps://si0.twimg.com/profile_images/사용자UID/aaa_normal.png