JiaoZiVideoPlayer Versions Save

实现了一行代码切换播放引擎的功能，一个里程碑的开始，解决了已知的自定义播放器的bug

1.自定义播放引擎 2.修改error状态的ui 3.bug修改和其他优化

1. Perfect scroll in list
2. fix bug

1.List of accurate sliding judgments 2.Optimization demo 3.Fix bug

1. 修复actionbar null pointbug
2. fix MP3 bug
3. fix scroll save progress bug
4. UI fix

1. 改名叫饺子视频播放器
2. Home键暂停，返回继续播放
3. Bug修复
4. Demo优化

1. Fix clarity bug

1. Change clarity
2. Thumb effect fix
3. Other fix

1.show battery level 2.show current system time 3.state callback 4.MyJCVideoPlayerStandard in MainActivity

1.bugs fix 2.states callback