[player] Execute ASAP methods in audio thread. Play single notes.
[tmc] Fixed empty module constructor. Build stripped module with just one position looped.
[player][pattern] Play one song position looped.
[instrument] Play notes in two octaves.
[subwindow] Improved volume bar readability.
[info] Added general module info editor.
[state] Manage editor state, starting with octave (used in instrument editor).