Support for Persian quartertone accidental notation

[Kees van den Doel]

Hi all,

Would it be possible to add the symbols for (approximate) quarter flat and 
quarter sharp that are standard in Persian music notation? They are called 
koron and sori, see attached scan for what they look like.
(The koron is the upside down flat with a triangular body.)
I'd be happy to produce a persian.ly file with key signatures for the Persian 
modes and correct MIDI tunings.

More info on Persian scales on my website http://members.shaw.ca/persianney

Cheers,
Kees