This is a beta release for AntennaPod 2.1.0

- A long-standing wish of many: playing local files! In the 'Add podcast' screen simply tap 'Add local folder' and select a location on your phone! (@ByteHamster, @igoralmeida & @damoasda)
- Pick a country for the 'Discover' screen (@tonytamsf)
- Keyboard shortcuts (@asdoi)
- Search the PodcastIndex.org database (@edwinhere)
- Pull to refresh (@asdoi)
- Playback speed & filter dialogs (@ByteHamster & @bws9000)
- Smooth sleep timer volume (@olivoto)