1.5.7:
* Fixed critical issue on Android
4.0.*
1.5.6:
* Fixed position saving issue
1.5.5:
* Fixed storage permission issue on
Android 6
1.5.4:
* Fixed status bar behaviour on Android
4.3 and lower
* Minor fixes
1.5:
* This version available for Android 3
and higher only.
* Material design.
* Fully compatible with FBReader
2.6.