* lily/system-start-delimiter.cc (print): allow style = text too.

* lily/system-start-delimiter.cc (print): allow style = text too.

* lily/system-start-delimiter-engraver.cc
(acknowledge_system_start_text): new function, also add add to
support of system-start-text (instrument names). This fixes
instrument names on piano staves.

* lily/instrument-name-engraver.cc: rewrite. Use
system-start-delimiter approach. This save memory and cpu.

* scm/define-grobs.scm (all-grob-descriptions): remove
instrument-name from break-alignment.

* mf/GNUmakefile ($(NCSB_TTFS)): depend on pfx2ttf script too.