1.0.2

升级至1.0.2

1.FileCallBack 增加onProgressChanged(long current, long total, float progress) 方法
2.FileCallBack 变更FileCallBack(File, boolean)构造方法
3.FileCallBack 增加FileCallBack(File target, boolan append, int bufferSize, float limitProgress, int timeDiff)构造方法
4.修复FileCallBack 当target是一个文件夹时结果不正确的Bug