 
Version 5.2.0 brings several changes:

* suppressed log.d messages in release app (unbelievable incomplete suppression last time)
* made loadAdditionalFeedItemListData of DBReader a bit more efficient
* reduced unnecessary loading of media info in AudioPlayer
* tuned playback controller for efficiency
* improved player details view and corrected issue of showing wrong info
* tuned episode info view for efficiency
* tuned feed info view for start efficiency
* tuned and slimmed down the drawer: number of Subscriptions now shows the number of subscriptions
* replaced many RxJava stuff with Kotlin Coroutines
