* input/regression/new-markup-scheme.ly: oops. font-family=music

* input/regression/new-markup-scheme.ly: oops. font-family=music
-> font-encoding fetaMusic.

* lily/main.cc: put default to PS.

* lily/tfm.cc: idem.

* lily/afm.cc: idem.

* lily/include/modified-font-metric.hh (struct
Modified_font_metric): remove coding_scheme() method.

* input/mutopia/F.Schubert/morgenlied.ly: convert to utf8

* scripts/convert-ly.py (conv): crash on encountering \encoding.

* input/les-nereides.ly: convert to utf8

* lily/modified-font-metric.cc (text_dimension): idem.

* lily/parser.yy (TODO): idem.

* lily/include/lily-lexer.hh (class Lily_lexer): idem.

* lily/lexer.ll: remove encoding

* lily/font-metric.cc (design_size): design_size returns a
dimension now as well.