아이폰] FbGraph Api - facebook login

http://www.youtube.com/watch?v=869szA58XPY 동영상

http://www.raywenderlich.com/1488/how-to-use-facebooks-new-graph-api-from-your-iphone-app
http://blog.naver.com/PostView.nhn?blogId=sukjun40&logNo=100134134817