


- keep exam file in /tmp and restore it when crash or so
- improve cooperation a staff with piano staff - merge them somehow
- merge out&in sounds into single call-back method (class)
- add option of playing sound during capture
- add option for configuring fret marks (dots)
- convert pointers requiring to be 0 to QPointer type
- better and equal algorithm of questioning
- add setFlag(ItemHasNoContents) to QGraphicsItem sub-classes don't has a paint() - used as containers only
- convert level file to text format (for sure) and exam file as well (consider)
- preview of questions in Level Creator (list, on the guitar, in the score)
- revert to native style under MacOs when Qt5 
- comparing exams (charts)
- add sound during wizard and About dialog (???)
- make use of QWizard for above

Tnote
			- overload + and - operators to raise/drop a note
			- consider to change TnotesList type to QList<Tnote>
			
TEXAMEXECUTOR
  - think about hide octave in note name format when octaves are not required in answers. 
     Also for questions in "hint" - don't show octave when only name is required   
