Merge pull request #105 from liyhcharles/master

Edit Immersive Mode for KitKat to show action bar along with system ui
Merge pull request #107 from liyhcharles/master

Fixed bug for immersive mode where bars would not hide on restart
Update parser to handle ToAru using h4
Update parser for index, fix infinite loop
Update parser: remove h4 detection, add check for volume without chapter
but have url (Index's short stories)
Add DB Check (tap db storage)
Modify scroll to top if on p-index=0
fix missing parameter` error exception
Add AutoBackupService

not tested yet :P
Update DB Auto Backup and DB Restore
Update auto backup logic
Update prefs handler