chrissawer/The-Mutopia-Project — pull request #484 by fedelibre (2014-09-07 18:01:53+00:00)
Title: issue #458: Oaken bucket

I usually prefer using the available options in \layout, but I realized that automatic center of systems when line-width is set works only if line-width is in a \paper block:
http://lists.gnu.org/archive/html/bug-lilypond/2014-09/msg00021.html

Output looks ok to me.