Log Message:
Updated abcm2ps to 8.13.4.

---- Version 8.13.4 - 2017-01-16 ----

Fix bad note transposition after generation restart
	(reported by Frédéric Boulanger)
Fix bad generation when decoration defined by <defs> with 'h' in <path>
Fix bad PS output when utf-8 characters in title and pango support
	(reported by Timm Reasbeck)
Fix abnormal errors when many ABC source files in the command line
Fix again bad glyph for cut time meter
	(reported by Timm Reasbeck)
Fix double include when xx.default.abc in command line
Fix compilation warning and bad PS %%musicfont definition
	(reported by David Lacroix)