Testing needed for 2.13.15

[Patrick McCarty]

Hello,

LilyPond 2.13.15 is out, and the official installers include an
experimental commit that needs wider testing.  It seems to fix the
issue of extra fonts leaking into the regtests and bloating the
test-output tarball.

This is the commit:
http://git.savannah.gnu.org/gitweb/?p=lilypond.git;a=commitdiff;h=910b1ff742f07dacf5f9e3808bc1165def61c715

To test, use LilyPond 2.13.15 to process multiple input files at the
same time, and afterward make sure that the text fonts in each
resulting PDF are rendered correctly.  For example, you could run

  lilypond file1.ly file2.ly file3.ly

Any volunteers to test on Mac OS X or Windows (or Wine)?  I'm pretty
sure this works okay on GNU/Linux systems.

Thanks,
Patrick