Changes
- Added portuguese translation (@devjaizon)
- Fixed an issue where the audio track and subtitle menu wouldn't appear in fullscreen mode (#9)
- Fixed an issue where a video would not resume at the last position
- Fixed an issue where the fullscreen button (or the F key) would not exit fullscreen mode
- Added a button to mark an item as played/unplayed (#13)
- Added a feature, where the last used language & subtitles will be used for the next time playing that item (user preferences for languages will follow)