为了pull代码
Merge branch 'master' of https://github.com/wanghongbo/GameCenter
Merge branch 'master' of https://github.com/wanghongbo/GameCenter
完成登陆功能
Merge branch 'master' of https://github.com/wanghongbo/GameCenter
Merge branch 'master' of https://github.com/wanghongbo/GameCenter
删除多余文件
Merge branch 'master' of https://github.com/wanghongbo/GameCenter