Log Message:
Update abcm2ps to 4.12.22.

Changes since 4.12.19:
Bigger horizontal space for microtonal accidentals.
Bad time signature on remaining staves when %%timewarn activayed.
Erroneous expansion of multi-measure rests when voice overlay.
Treat the decorations of multi-measure rests.
Bad broken rhythm ('>', '<') when space ('y') inside.
Vertical offset problem when %%multicol at start of ABC file.
Sometimes, bad horizontal offset of symbol when at start of line.
Bad stem direction or dot/tenuto vertical offset in upper voices
	after a rest.