csorensen fork of lilypond

[Carl D. Sorensen]

Han-Wen,

I've finally got the csorensen fork ready for cherry picking.  It includes a 
completely revised file input/regression/fret-diagrams.ly, along with 
modifications to scm/define-grobs, scm/define-interfaces, 
scm/define-grob-properties, and scm/fret-diagrams.  It adds a few new 
fret-diagrams properties, and moves all of the fret-diagram-specific properties 
out of the general namespace and into fret-diagram-details.

I've never written a convert-ly rule before, and I don't know how to submit 
them if I did (I guess I could just change convert-ly on the csorensen fork, 
and then it would be part of the cherry picking).  However, for this first one, 
I have just created a text file that mentions my intent in the convert-ly rule 
and has my guess of what the appropriate code would be.  Any guidance on this 
rule would be appreciated.

Thanks,

Carl

convert-rule
Description: convert-rule