Merge pull request #7 from callofdutyops/master

libs写入build.gradle,方便管理
Merge pull request #8 from callofdutyops/master

修改.gitignore,删除build文件夹
Merge pull request #9 from callofdutyops/master

优化登陆界面
Merge pull request #10 from callofdutyops/master

登陆换为mobile的APi
Merge pull request #11 from callofdutyops/master

添加网络连接检查以及代码格式化
import UpdateChecker
store uid, username
modify .gitignore