Extended Helmholtz-Ellis JI PItch Notationn

[Graham Breed]

I now have my Lilypond JI code working with the Extended Helmholtz-Ellis 
Pitch Notation.  This is something I've been putting off for some time 
because it means the function that determines the original accidental 
has to know the original ratio that it refers to.  After the more recent 
discussion here, I decided to use a global list to keep lookups of 
alterations to ratios, and all is well so long as you don't transpose 
anything.

You can get the code from the git repository:

https://bitbucket.org/x31eq/microlily

I have a "don't care" attitude to licensing, which is made explicit in 
the README.  So, if you want to copy any ideas for your code for other 
JI notations, feel free.  The same input code should work for different 
notation systems, as it currently does for different kinds of Sagittal 
and the new Helmholtz-Ellis.


                   Graham