.ignore 更新，注意忽略
proguard-project.txt，
project.properties
.settings
model草稿，主要接口
README.md
rearrange
Merge branch 'master' into Luke
增加了音量类
去掉了所有get set
复写了深度clone方法
Merge branch 'dataModel'
nothing
Merge branch 'master' into Luke
忘记add了……摔！
Merge branch 'dataModel'
Merge branch 'master' into Luke
NotificationSender changed.
Doc added.