the One True Way to exclude outdated support-v4 artifact
Travis: 去掉 apt-get 提示信息来减小点 build log 体积 for real
WIP: 公共辅助代码库分离 - 包结构和少量实现分离
完整迁移偏好设置部分
Merge branch 'master' into feature/proguard-obfuscation

Conflicts:
	proguard.cfg
更新数据对象部分 Proguard 配置
Merge branch 'master' into feature/proguard-obfuscation

Conflicts:
	proguard.cfg