Updated util's getRectPoints to work even with funky points, as long as they are in a rectangle. For this func, a line is counted as a rect.
Added methods to copyNote (note.ja), and get put and transpose notes in a rectangle: (song.js).
updated count.js to show only lines.
Fixed bugs in song.js, added buttons to the tracker panel, implemented the play button in the tracker, and added and implemented a button to play the song in the files/open panel.