[nuyqalxo] Reflow sheet music

With people reading sheet music on smartphones and tablets these days, the ability to automatically zoom and reflow sheet music would be useful.  Perhaps Lilypond.

More radically, create a way to denote music as pure text (perhaps Unicode) so that text reflow engines can be reused.  This seems difficult as music is so complicated that a two-dimensional layout seems necessary.  I suppose two-dimensional layout engines do also exist, e.g., CSS box model.