BitStream: Live streaming

Mar 31, 2017

This is a major update, enjoy!
* UX tweaks; cleaner RTMP encoder dialog
* Camera FPS and encoder FPS options (to allow 60 fps input)
* YouTube 2160p (4K) and SuperChat replacing FanFundings
* Twitch max bitrate increased to latest supported
* Options to lock and remember camera rotation
* Enable/disable device rotation detector on the fly
* Camera preview no longer uses fixed-fps rate to save battery while not encoding
* Fix audio encoder not being released after encoding ends and other issues.