New feature suggestion

[David Winfrey]

A new accidental for entering natural notes would be useful.

In English, this would be 'n', as in 'bn4' or 'gn2'.

These would have exactly the same effect as 'b4' or 'g2',
but would be easier to debug.

If the user is entering or editing music in the key of F,
or some other key where B is normally flat, it is often
not clear if 'b4' was intended to be B-natural, or if
someone just forgot to flat it.

If the note is written as 'bn4', the note was clearly
meant to be B-natural.