* in EpisodeInfo, if podcasting2.0 chapters are available, show Download chapters button
* in transcript options list, added icon to copy to clipboard, url is not shown
* in Stream composer, added "Use muxed video" option
* improved switching from audio-only to video
* fixed Cancel button not cancelling download
* enabled downloading media from external sources (experimental)
* set R8 to keep app code, fixed widget not playing, and perhaps other related issues
