* Rewrote Backup
* Save automatic backups with datetime
* Minor improvements
* Remove suggested directories for backup and hardcoded strings. Rename JSON -> Backup
* Bugfix
* Fix tests
* Run restore inside a transaction, use external cache dir for log and other minor changes
* Implement language switching using BaseActivity
* Add requested changes
* Cleanup App.kt Imports and add pref_language_key
* Acutally use @string for key
* Use string resource for language preference title
* Saving to SD working
* Rename imagePath to uri
* Handle android < 21
* Minor changes
* Separate downloader from the manager. Optimize folder lookups
* Persist downloads across restarts
* Fix for #511
* Updated ReactiveNetwork. Add some documentation
* More documentation and minor fixes
* Handle persistent notifications. Other minor changes
* Improve downloader and add documentation
* Rename pageNumber to index in Page class
* Remove unused methods
* Use chop method
* Make sure dest dir is created
* Reset downloads dir preference
* Use invalidate options menu in download fragment and fix wrong condition
* Fix empty download queue after application restart
* Use addAll method in download queue to avoid too many notifications
* Inform download manager changes
* [WIP] Custom color filter for reader
* Improvements
* temp image to prevent build error
* Shift all the bits
* Some improvements. Removed DiscreteSeekBar
* Improvements
* API 16 + fixes
* Reduced lag. Fixed brightness value being reset to 0
* Small fixes
* Complete auto updates checker
* Use GcmTaskService for the periodical updates checker
* Persist task across reinstalls
* Hide setting instead of disabling
* Minor refactor
* Added in the ability to view the library as a list
* reverted LibraryAdapter and renamed libraryToggleViewEvent to LibraryToggleViewEvent for consistency
* removed LibraryToggleViewEvent and directly subscribed to option change
* fixed the toggleView subscription
* Made the library list item layout more compliant with material design
* Changed unread text style and removed background
