Readings Viewer

Currently, the content including album, GIFs, video and article.

For album:
- Vertically and horizontally (include RTL) browsing direction
- Adjust brightness
- Volume key to turn the page
- Jump to specific page
- By folder browsing album
- Browsing indicator (current page, time, network state and battery life)

For video:
- Support most of video formats
- Playing forward/backward
- Screen rotation (landscape and portrait)
- Double speed playing
- Support subtitles (such as WebVTT)

For article:
- Support adjust text size and paragraph lines
- Vertically and horizontally browsing direction
- Smart line break