Output from midi2ly

[Phil Holmes]

Midi2ly, as used in the make doc build system, puts 2 types of message on 
the terminal: "LY output to (filename)" and "Warning, more than 5 voices 
found.  Expect bad output".

Seems to me we could:

1) Get rid of the first message completely by deleting the print line.  We 
then have the problem of what to do with the warning.
2) Use run-and-check to push both to logfiles
3) Add an option to midi2ly to suppress output and warnings and use this in 
the build.

2 is easiest, but adds yet more logfiles and loses a potentially useful 
warning.  Any thoughts?

--
Phil Holmes