v.2.0.0

• added new add-option: from link for adding songs from url
• added tags system
• improved chord fingerings system
• added setting only for android: Library path (may have some bugs)
• added per song autoscroll delay (autoscroll settings on long tap on autoscroll button)
• added capo settings (fretboard)
• added key settings (circle-of-fifth)
• added flat notes and chords handling
• added Ctrl+S and Ctrl+Q shortcuts in editor (first is save, second is quit)
• added shortcuts for switching editor modes: Ctrl+Alt+S, Ctrl+Alt+R, Ctrl+Alt+N
• improvement for scroll in editor
• many small fixes