majalan

Copperbox revision 3248.

I've simplified ET12Chords, making it just functional rather than a weird monadic "command language".

It's disappointing that it has taken some reflection to realize the original design was so horrible (partial mitigation: I was trying to get a postfix notation without adding my own postfix application operator). It would be fair to expect that I've enough experience now to reject gawky, over-complicated code when I write it, rather than need a fortnight's hindsight to reveal it's problems.