Fragment layout.
Restore playbar functionality.
Updated AssimiDatabase handling to support selecting starred/unstarred and language selection.
Enable navigation from drawer
Restore functionality to show translations through menu.
Add context menu for playmode and translation.
Fix the currently highlighted lesson text when switching to the next
lesson.
Fixed crash on rotate while loading
Persistently store playmode and listmode
Highlight currently selected language in navigation drawer.
Add option to show all courses in LessonList.
Restore last selected course on start-up.
Fixed navigation issues related to rotating.
Show current lesson/track immediately after startup finished.
Improve logging.
Remove outdated comments
Improve comment.
Add separator between content and playbar.
Redesign LoaderFragment to show when no lessons have been found.
Add option to force re-scan of lessons.