[*] For the exercise files added a new option of their frequency switching. It can be used for ajust switching files in mode "By productivity". This setting allows you customise how often (or rarely) the exercise will be offered for playing. (After "Next Exercise" button pressing.)
[*]Added a new type of exercise - "Chords". This mode is very similar to the mode "Random Notes", but instead of scattered consonances is generated major and minor chords.
[*] Program settings are made more structured. Options for the different modes now appear on the separate tabs only when given mode is selected.
