New reader (#1550)

* Delete old reader

* Add utility methods

* Update dependencies

* Add new reader

* Update tracking services. Extract transition strings into resources

* Restore delete read chapters

* Documentation and some minor changes

* Remove content providers for compressed files, they are not needed anymore

* Update subsampling. New changes allow to parse magic numbers and decode tiles with a single stream. Drop support for custom image decoders. Other minor fixes

app/src/main/java/eu/kanade/tachiyomi/widget/ViewPagerAdapter.kt

@@ -27,4 +27,8 @@ abstract class ViewPagerAdapter : PagerAdapter() {
         return view === obj
     }
 
-}
+    interface PositionableView {
+        val item: Any
+    }
+
+}