* Retain last read page when using the webtoon mode, see issue #453
* #738 inorichi's request change to webtoonreader pull request
* #738 per inorichi recycler could be null at the point
scrollToLastPageRead was called, moved to below the check in the view
had been initialized.
* add local source
* small fixes
* change Chapter to SChapter and and Manga to SManga in ChapterRecognition.
Use ChapterRecognition.parseChapterNumber() to recognize chapter numbers.
* use thread poll
* update isImage()
* add isImage() function to DiskUtil
* improve cover handling
* Support external SD cards
* use R.string.app_name as root folder name
* 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
* Added option to download page or set page as cover
* Removed network call now copies from page image
* Format fix + notification feedback
* Added code to prevent OutOfMemory error. Made notification optional. Can now save image on long press. Bug fixes
* Now uses glide for notification
* Fixed webtoon page
* Fixes + API 16 support
* fixes
* Fixed API 24 FileProvider error
* Added page.ready check
* Indention
