SB.Reader

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Added:
- Integration with cloud storages;
- Clipboard reading from any application;
- Adding files to library from any file manager;
- Adding files from any applicaton via "send to..." share action.

Improved:
- Application size;
- Some visuals;
- Some performance issues.

Fixed:
- Power consumtion on fast reading;
- Android 6.0 and later compatibility;
- Showcase now work on any hardw