HNotate, Bala and ZMidi

Copperbox revision 339.

HNotate - I've changed the type signature of the sectioning functions in Fits so that the divisor is before the sequence. I should have spotted that the previous signature (sequence before divisor) wasn't idiomatic when I wrote it. The idiomatic style is characterized by replicate in Data.List:

replicate :: Int -> a -> [a]

Bala and ZMidi - minor tidy ups.