+LilyPond development is hosted at http://savannah.gnu.org/projects/lilypond
+
Here is an attempt at a simple explanation of the directory layout for
LilyPond's source files.
J.S.Bach/
intl/ library for gettext
po/ translations
- ports/
+ ports/ access to mutopia archive
ps/ postscript library files
tex/ TeX library files
scm/ Scheme initialisation and subroutine files